64975057 has 4 divisors (see below), whose sum is σ = 74257216. Its totient is φ = 55692900.

The previous prime is 64975049. The next prime is 64975061. The reversal of 64975057 is 75057946.

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: 75057946 = 2 ⋅37528973.

It is a cyclic number.

It is not a de Polignac number, because 64975057 - 2³ = 64975049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64975007) 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, 4641069 + ... + 4641082.

It is an arithmetic number, because the mean of its divisors is an integer number (18564304).

Almost surely, 2^64975057 is an apocalyptic number.

It is an amenable number.

64975057 is a deficient number, since it is larger than the sum of its proper divisors (9282159).

64975057 is an equidigital number, since it uses as much as digits as its factorization.

64975057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282158.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 64975057 is about 8060.7107006765. The cubic root of 64975057 is about 402.0211390417.

The spelling of 64975057 in words is "sixty-four million, nine hundred seventy-five thousand, fifty-seven".