75655657 has 12 divisors (see below), whose sum is σ = 96008976. Its totient is φ = 58952040.

The previous prime is 75655633. The next prime is 75655691.

75655657 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 75655657 - 2¹⁵ = 75622889 is a prime.

It is a super-2 number, since 2×75655657² = 11447556872203298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75655157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69643 + ... + 70720.

It is an arithmetic number, because the mean of its divisors is an integer number (8000748).

Almost surely, 2^75655657 is an apocalyptic number.

75655657 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

75655657 is a deficient number, since it is larger than the sum of its proper divisors (20353319).

75655657 is a wasteful number, since it uses less digits than its factorization.

75655657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140388 (or 140381 counting only the distinct ones).

The product of its digits is 1102500, while the sum is 46.

The square root of 75655657 is about 8698.0260404301. The cubic root of 75655657 is about 422.9416634188.

The spelling of 75655657 in words is "seventy-five million, six hundred fifty-five thousand, six hundred fifty-seven".