75812681 has 4 divisors (see below), whose sum is σ = 86643072. Its totient is φ = 64982292.

The previous prime is 75812651. The next prime is 75812683. The reversal of 75812681 is 18621857.

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: 18621857 = 29 ⋅642133.

It is a cyclic number.

It is not a de Polignac number, because 75812681 - 2²⁶ = 8703817 is a prime.

It is a super-2 number, since 2×75812681² = 11495125200815522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75812683) 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, 5415185 + ... + 5415198.

It is an arithmetic number, because the mean of its divisors is an integer number (21660768).

Almost surely, 2^75812681 is an apocalyptic number.

It is an amenable number.

75812681 is a deficient number, since it is larger than the sum of its proper divisors (10830391).

75812681 is a wasteful number, since it uses less digits than its factorization.

75812681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830390.

The product of its digits is 26880, while the sum is 38.

The square root of 75812681 is about 8707.0477775191. The cubic root of 75812681 is about 423.2340676314.

The spelling of 75812681 in words is "seventy-five million, eight hundred twelve thousand, six hundred eighty-one".