12640077 has 8 divisors (see below), whose sum is σ = 18726080. Its totient is φ = 8426700.

The previous prime is 12640037. The next prime is 12640091. The reversal of 12640077 is 77004621.

12640077 is a `hidden beast` number, since 12 + 640 + 0 + 7 + 7 = 666.

12640077 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12640077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 468151 = 12640077 / (1 + 2 + 6 + 4 + 0 + 0 + 7 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12640077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234049 + ... + 234102.

It is an arithmetic number, because the mean of its divisors is an integer number (2340760).

Almost surely, 2^12640077 is an apocalyptic number.

It is an amenable number.

12640077 is a deficient number, since it is larger than the sum of its proper divisors (6086003).

12640077 is an equidigital number, since it uses as much as digits as its factorization.

12640077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468160 (or 468154 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 12640077 is about 3555.2885958808. The cubic root of 12640077 is about 232.9431299126.

Adding to 12640077 its reverse (77004621), we get a palindrome (89644698).

The spelling of 12640077 in words is "twelve million, six hundred forty thousand, seventy-seven".