80645966 has 16 divisors (see below), whose sum is σ = 123545088. Its totient is φ = 39468000.

The previous prime is 80645959. The next prime is 80645969. The reversal of 80645966 is 66954608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80645969) 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, 69491 + ... + 70641.

It is an arithmetic number, because the mean of its divisors is an integer number (7721568).

Almost surely, 2^80645966 is an apocalyptic number.

80645966 is a deficient number, since it is larger than the sum of its proper divisors (42899122).

80645966 is a wasteful number, since it uses less digits than its factorization.

80645966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 80645966 is about 8980.3099055656. The cubic root of 80645966 is about 432.0435734226.

The spelling of 80645966 in words is "eighty million, six hundred forty-five thousand, nine hundred sixty-six".