64684077 has 4 divisors (see below), whose sum is σ = 86245440. Its totient is φ = 43122716.

The previous prime is 64684069. The next prime is 64684093. The reversal of 64684077 is 77048646.

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 64684077 - 2³ = 64684069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64684057) 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, 10780677 + ... + 10780682.

It is an arithmetic number, because the mean of its divisors is an integer number (21561360).

Almost surely, 2^64684077 is an apocalyptic number.

It is an amenable number.

64684077 is a deficient number, since it is larger than the sum of its proper divisors (21561363).

64684077 is a wasteful number, since it uses less digits than its factorization.

64684077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21561362.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 64684077 is about 8042.6411706603. The cubic root of 64684077 is about 401.4201126502.

The spelling of 64684077 in words is "sixty-four million, six hundred eighty-four thousand, seventy-seven".