80664977 has 4 divisors (see below), whose sum is σ = 82032240. Its totient is φ = 79297716.

The previous prime is 80664973. The next prime is 80665001. The reversal of 80664977 is 77946608.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80664977 - 2² = 80664973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80664973) 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, 683543 + ... + 683660.

It is an arithmetic number, because the mean of its divisors is an integer number (20508060).

Almost surely, 2^80664977 is an apocalyptic number.

It is an amenable number.

80664977 is a deficient number, since it is larger than the sum of its proper divisors (1367263).

80664977 is a wasteful number, since it uses less digits than its factorization.

80664977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367262.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 80664977 is about 8981.3683255949. The cubic root of 80664977 is about 432.0775198821.

The spelling of 80664977 in words is "eighty million, six hundred sixty-four thousand, nine hundred seventy-seven".