75656665657 has 8 divisors (see below), whose sum is σ = 76389737984. Its totient is φ = 74927109888.

The previous prime is 75656665633. The next prime is 75656665661.

75656665657 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75656665657 - 2³¹ = 73509182009 is a prime.

It is a super-4 number, since 4×75656665657⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75656665757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835893 + ... + 921970.

It is an arithmetic number, because the mean of its divisors is an integer number (9548717248).

Almost surely, 2^75656665657 is an apocalyptic number.

It is an amenable number.

75656665657 is a deficient number, since it is larger than the sum of its proper divisors (733072327).

75656665657 is a wasteful number, since it uses less digits than its factorization.

75656665657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758279.

The product of its digits is 238140000, while the sum is 64.

The spelling of 75656665657 in words is "seventy-five billion, six hundred fifty-six million, six hundred sixty-five thousand, six hundred fifty-seven".