80663731 has 4 divisors (see below), whose sum is σ = 80681832. Its totient is φ = 80645632.

The previous prime is 80663711. The next prime is 80663741. The reversal of 80663731 is 13736608.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80663731 - 2⁷ = 80663603 is a prime.

It is a super-2 number, since 2×80663731² = 13013274997680722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80663701) 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, 2856 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (20170458).

Almost surely, 2^80663731 is an apocalyptic number.

80663731 is a deficient number, since it is larger than the sum of its proper divisors (18101).

80663731 is a wasteful number, since it uses less digits than its factorization.

80663731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18100.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 80663731 is about 8981.2989595047. The cubic root of 80663731 is about 432.0752951605.

The spelling of 80663731 in words is "eighty million, six hundred sixty-three thousand, seven hundred thirty-one".