646674066 has 24 divisors (see below), whose sum is σ = 1407775824. Its totient is φ = 214535160.

The previous prime is 646674053. The next prime is 646674073. The reversal of 646674066 is 660476646.

646674066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81336 + ... + 88931.

It is an arithmetic number, because the mean of its divisors is an integer number (58657326).

Almost surely, 2^646674066 is an apocalyptic number.

646674066 is an abundant number, since it is smaller than the sum of its proper divisors (761101758).

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

646674066 is a wasteful number, since it uses less digits than its factorization.

646674066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170486 (or 170483 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 646674066 is about 25429.7869829851. The cubic root of 646674066 is about 864.7591145431.

The spelling of 646674066 in words is "six hundred forty-six million, six hundred seventy-four thousand, sixty-six".