664617270 has 16 divisors (see below), whose sum is σ = 1595081520. Its totient is φ = 177231264.

The previous prime is 664617259. The next prime is 664617281. The reversal of 664617270 is 72716466.

664617270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664617259) and next prime (664617281).

It is a super-2 number, since 2×664617270² = 883432231164505800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11076925 + ... + 11076984.

It is an arithmetic number, because the mean of its divisors is an integer number (99692595).

Almost surely, 2^664617270 is an apocalyptic number.

664617270 is an abundant number, since it is smaller than the sum of its proper divisors (930464250).

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

664617270 is a wasteful number, since it uses less digits than its factorization.

664617270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22153919.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 664617270 is about 25780.1720320094. The cubic root of 664617270 is about 872.6843894550.

The spelling of 664617270 in words is "six hundred sixty-four million, six hundred seventeen thousand, two hundred seventy".