664530370 has 32 divisors (see below), whose sum is σ = 1383516288. Its totient is φ = 225091968.

The previous prime is 664530367. The next prime is 664530379. The reversal of 664530370 is 73035466.

It is a super-2 number, since 2×664530370² = 883201225304673800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664530379) 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, 51379 + ... + 62998.

It is an arithmetic number, because the mean of its divisors is an integer number (43234884).

Almost surely, 2^664530370 is an apocalyptic number.

664530370 is an abundant number, since it is smaller than the sum of its proper divisors (718985918).

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

664530370 is a wasteful number, since it uses less digits than its factorization.

664530370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114474.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 664530370 is about 25778.4865731098. The cubic root of 664530370 is about 872.6463527370.

The spelling of 664530370 in words is "six hundred sixty-four million, five hundred thirty thousand, three hundred seventy".