75806681 has 16 divisors (see below), whose sum is σ = 79380480. Its totient is φ = 72349200.

The previous prime is 75806677. The next prime is 75806683. The reversal of 75806681 is 18660857.

It is a cyclic number.

It is not a de Polignac number, because 75806681 - 2² = 75806677 is a prime.

It is a super-2 number, since 2×75806681² = 11493305768471522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75806683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501956 + ... + 502106.

It is an arithmetic number, because the mean of its divisors is an integer number (4961280).

Almost surely, 2^75806681 is an apocalyptic number.

It is an amenable number.

75806681 is a deficient number, since it is larger than the sum of its proper divisors (3573799).

75806681 is a wasteful number, since it uses less digits than its factorization.

75806681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 75806681 is about 8706.7032222306. The cubic root of 75806681 is about 423.2229020789. Note that the first 3 decimals are identical.

The spelling of 75806681 in words is "seventy-five million, eight hundred six thousand, six hundred eighty-one".