64677646 has 24 divisors (see below), whose sum is σ = 108256680. Its totient is φ = 28952880.

The previous prime is 64677637. The next prime is 64677659.

64677646 is nontrivially palindromic in base 10.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64677596 and 64677605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14220 + ... + 18208.

It is an arithmetic number, because the mean of its divisors is an integer number (4510695).

Almost surely, 2^64677646 is an apocalyptic number.

64677646 is a deficient number, since it is larger than the sum of its proper divisors (43579034).

64677646 is a wasteful number, since it uses less digits than its factorization.

64677646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080 (or 4069 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 46.

The square root of 64677646 is about 8042.2413542494. The cubic root of 64677646 is about 401.4068089212.

The spelling of 64677646 in words is "sixty-four million, six hundred seventy-seven thousand, six hundred forty-six".