80691886 has 16 divisors (see below), whose sum is σ = 132674688. Its totient is φ = 36502200.

The previous prime is 80691859. The next prime is 80691887. The reversal of 80691886 is 68819608.

It is a super-2 number, since 2×80691886² = 13022360932473992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80691887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4050 + ... + 13333.

It is an arithmetic number, because the mean of its divisors is an integer number (8292168).

Almost surely, 2^80691886 is an apocalyptic number.

80691886 is a deficient number, since it is larger than the sum of its proper divisors (51982802).

80691886 is a wasteful number, since it uses less digits than its factorization.

80691886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17607.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 80691886 is about 8982.8662463603. The cubic root of 80691886 is about 432.1255600676.

The spelling of 80691886 in words is "eighty million, six hundred ninety-one thousand, eight hundred eighty-six".