646665162 has 32 divisors (see below), whose sum is σ = 1519439040. Its totient is φ = 180885120.

The previous prime is 646665139. The next prime is 646665163. The reversal of 646665162 is 261566646.

It is a happy number.

646665162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (646665163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375987 + ... + 377702.

It is an arithmetic number, because the mean of its divisors is an integer number (47482470).

Almost surely, 2^646665162 is an apocalyptic number.

646665162 is an abundant number, since it is smaller than the sum of its proper divisors (872773878).

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

646665162 is a wasteful number, since it uses less digits than its factorization.

646665162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753718.

The product of its digits is 311040, while the sum is 42.

The square root of 646665162 is about 25429.6119120996. The cubic root of 646665162 is about 864.7551455934.

The spelling of 646665162 in words is "six hundred forty-six million, six hundred sixty-five thousand, one hundred sixty-two".