64676657 has 4 divisors (see below), whose sum is σ = 64705536. Its totient is φ = 64647780.

The previous prime is 64676603. The next prime is 64676659. The reversal of 64676657 is 75667646.

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 64676657 - 2¹⁴ = 64660273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64676659) 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, 10769 + ... + 15662.

It is an arithmetic number, because the mean of its divisors is an integer number (16176384).

Almost surely, 2^64676657 is an apocalyptic number.

It is an amenable number.

64676657 is a deficient number, since it is larger than the sum of its proper divisors (28879).

64676657 is a wasteful number, since it uses less digits than its factorization.

64676657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28878.

The product of its digits is 1270080, while the sum is 47.

The square root of 64676657 is about 8042.1798661806. The cubic root of 64676657 is about 401.4047629110.

The spelling of 64676657 in words is "sixty-four million, six hundred seventy-six thousand, six hundred fifty-seven".