80660688 has 20 divisors (see below), whose sum is σ = 208373568. Its totient is φ = 26886880.

The previous prime is 80660677. The next prime is 80660689. The reversal of 80660688 is 88606608.

It is a super-2 number, since 2×80660688² = 13012293177266688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80660689) 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, 840168 + ... + 840263.

Almost surely, 2^80660688 is an apocalyptic number.

It is an amenable number.

80660688 is an abundant number, since it is smaller than the sum of its proper divisors (127712880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80660688 is a wasteful number, since it uses less digits than its factorization.

80660688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680442 (or 1680436 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 80660688 is about 8981.1295503405. The cubic root of 80660688 is about 432.0698618154.

The spelling of 80660688 in words is "eighty million, six hundred sixty thousand, six hundred eighty-eight".