80657997 has 16 divisors (see below), whose sum is σ = 125228160. Its totient is φ = 45220032.

The previous prime is 80657977. The next prime is 80657999. The reversal of 80657997 is 79975608.

It is not a de Polignac number, because 80657997 - 2⁶ = 80657933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80657999) 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, 35122 + ... + 37347.

It is an arithmetic number, because the mean of its divisors is an integer number (7826760).

Almost surely, 2^80657997 is an apocalyptic number.

It is an amenable number.

80657997 is a deficient number, since it is larger than the sum of its proper divisors (44570163).

80657997 is a wasteful number, since it uses less digits than its factorization.

80657997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72532.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 80657997 is about 8980.9797349732. The cubic root of 80657997 is about 432.0650568604.

The spelling of 80657997 in words is "eighty million, six hundred fifty-seven thousand, nine hundred ninety-seven".