75660813 has 12 divisors (see below), whose sum is σ = 110350240. Its totient is φ = 49950216.

The previous prime is 75660811. The next prime is 75660901. The reversal of 75660813 is 31806657.

It is not a de Polignac number, because 75660813 - 2¹ = 75660811 is a prime.

It is a super-3 number, since 3×75660813³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75660811) 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, 39883 + ... + 41736.

Almost surely, 2^75660813 is an apocalyptic number.

It is an amenable number.

75660813 is a deficient number, since it is larger than the sum of its proper divisors (34689427).

75660813 is a wasteful number, since it uses less digits than its factorization.

75660813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81728 (or 81725 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 75660813 is about 8698.3224244678. The cubic root of 75660813 is about 422.9512711501.

The spelling of 75660813 in words is "seventy-five million, six hundred sixty thousand, eight hundred thirteen".