75664046657 has 4 divisors (see below), whose sum is σ = 78953787840. Its totient is φ = 72374305476.

The previous prime is 75664046593. The next prime is 75664046663.

75664046657 is nontrivially palindromic in base 10.

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 75664046657 - 2⁶ = 75664046593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75664046687) 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, 1644870557 + ... + 1644870602.

It is an arithmetic number, because the mean of its divisors is an integer number (19738446960).

Almost surely, 2^75664046657 is an apocalyptic number.

It is an amenable number.

75664046657 is a deficient number, since it is larger than the sum of its proper divisors (3289741183).

75664046657 is a wasteful number, since it uses less digits than its factorization.

75664046657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289741182.

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 75664046657 in words is "seventy-five billion, six hundred sixty-four million, forty-six thousand, six hundred fifty-seven".