77770700077 has 4 divisors (see below), whose sum is σ = 88880800096. Its totient is φ = 66660600060.

The previous prime is 77770700057. The next prime is 77770700089. The reversal of 77770700077 is 77000707777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77770700077 - 2⁷ = 77770699949 is a prime.

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 77770700077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770700027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555049999 + ... + 5555050012.

It is an arithmetic number, because the mean of its divisors is an integer number (22220200024).

Almost surely, 2^77770700077 is an apocalyptic number.

It is an amenable number.

77770700077 is a deficient number, since it is larger than the sum of its proper divisors (11110100019).

77770700077 is a wasteful number, since it uses less digits than its factorization.

77770700077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110100018.

The product of its (nonzero) digits is 823543, while the sum is 49.

The spelling of 77770700077 in words is "seventy-seven billion, seven hundred seventy million, seven hundred thousand, seventy-seven".