64675657 has 4 divisors (see below), whose sum is σ = 65303680. Its totient is φ = 64047636.

The previous prime is 64675649. The next prime is 64675673. The reversal of 64675657 is 75657646.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75657646 = 2 ⋅37828823.

It is a cyclic number.

It is not a de Polignac number, because 64675657 - 2³ = 64675649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64675627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313857 + ... + 314062.

It is an arithmetic number, because the mean of its divisors is an integer number (16325920).

Almost surely, 2^64675657 is an apocalyptic number.

It is an amenable number.

64675657 is a deficient number, since it is larger than the sum of its proper divisors (628023).

64675657 is a wasteful number, since it uses less digits than its factorization.

64675657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628022.

The product of its digits is 1058400, while the sum is 46.

The square root of 64675657 is about 8042.1176937421. The cubic root of 64675657 is about 401.4026941233.

The spelling of 64675657 in words is "sixty-four million, six hundred seventy-five thousand, six hundred fifty-seven".