646706796 has 12 divisors (see below), whose sum is σ = 1508982552. Its totient is φ = 215568928.

The previous prime is 646706791. The next prime is 646706803. The reversal of 646706796 is 697607646.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (646706791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26946105 + ... + 26946128.

It is an arithmetic number, because the mean of its divisors is an integer number (125748546).

Almost surely, 2^646706796 is an apocalyptic number.

It is an amenable number.

646706796 is an abundant number, since it is smaller than the sum of its proper divisors (862275756).

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

646706796 is a wasteful number, since it uses less digits than its factorization.

646706796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53892240 (or 53892238 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 51.

The square root of 646706796 is about 25430.4305114955. The cubic root of 646706796 is about 864.7737035969.

The spelling of 646706796 in words is "six hundred forty-six million, seven hundred six thousand, seven hundred ninety-six".