80665137 has 12 divisors (see below), whose sum is σ = 133161600. Its totient is φ = 46094328.

The previous prime is 80665111. The next prime is 80665141. The reversal of 80665137 is 73156608.

80665137 is a `hidden beast` number, since 80 + 66 + 513 + 7 = 666.

It is not a de Polignac number, because 80665137 - 2¹⁰ = 80664113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80665157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 640137 + ... + 640262.

It is an arithmetic number, because the mean of its divisors is an integer number (11096800).

Almost surely, 2^80665137 is an apocalyptic number.

It is an amenable number.

80665137 is a deficient number, since it is larger than the sum of its proper divisors (52496463).

80665137 is a wasteful number, since it uses less digits than its factorization.

80665137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280412 (or 1280409 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 80665137 is about 8981.3772329192. The cubic root of 80665137 is about 432.0778055590.

It can be divided in two parts, 8066 and 5137, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 80665137 in words is "eighty million, six hundred sixty-five thousand, one hundred thirty-seven".