646272670 has 16 divisors (see below), whose sum is σ = 1167588288. Its totient is φ = 257554080.

The previous prime is 646272661. The next prime is 646272677. The reversal of 646272670 is 76272646.

It is a happy number.

646272670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646272677) 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, 116529 + ... + 121948.

It is an arithmetic number, because the mean of its divisors is an integer number (72974268).

Almost surely, 2^646272670 is an apocalyptic number.

646272670 is a deficient number, since it is larger than the sum of its proper divisors (521315618).

646272670 is a wasteful number, since it uses less digits than its factorization.

646272670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238755.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 646272670 is about 25421.8935172028. The cubic root of 646272670 is about 864.5801564400.

The spelling of 646272670 in words is "six hundred forty-six million, two hundred seventy-two thousand, six hundred seventy".