75999681 has 16 divisors (see below), whose sum is σ = 113860800. Its totient is φ = 50095584.

The previous prime is 75999667. The next prime is 75999689. The reversal of 75999681 is 18699957.

It is not a de Polignac number, because 75999681 - 2¹⁷ = 75868609 is a prime.

It is a super-2 number, since 2×75999681² = 11551903024203522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75999689) 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, 13411 + ... + 18216.

It is an arithmetic number, because the mean of its divisors is an integer number (7116300).

Almost surely, 2^75999681 is an apocalyptic number.

It is an amenable number.

75999681 is a deficient number, since it is larger than the sum of its proper divisors (37861119).

75999681 is a wasteful number, since it uses less digits than its factorization.

75999681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31725 (or 31719 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 75999681 is about 8717.7795911574. The cubic root of 75999681 is about 423.5817657809.

The spelling of 75999681 in words is "seventy-five million, nine hundred ninety-nine thousand, six hundred eighty-one".