664743170 has 32 divisors (see below), whose sum is σ = 1472663808. Its totient is φ = 210379968.

The previous prime is 664743161. The next prime is 664743173. The reversal of 664743170 is 71347466.

664743170 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 (664743173) 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, 364334 + ... + 366153.

It is an arithmetic number, because the mean of its divisors is an integer number (46020744).

Almost surely, 2^664743170 is an apocalyptic number.

664743170 is an abundant number, since it is smaller than the sum of its proper divisors (807920638).

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

664743170 is a wasteful number, since it uses less digits than its factorization.

664743170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730514.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 664743170 is about 25782.6137154479. The cubic root of 664743170 is about 872.7394908558.

The spelling of 664743170 in words is "six hundred sixty-four million, seven hundred forty-three thousand, one hundred seventy".