664737070 has 32 divisors (see below), whose sum is σ = 1219276800. Its totient is φ = 260858016.

The previous prime is 664737049. The next prime is 664737071. The reversal of 664737070 is 70737466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664737071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423427 + ... + 424993.

It is an arithmetic number, because the mean of its divisors is an integer number (38102400).

Almost surely, 2^664737070 is an apocalyptic number.

664737070 is a deficient number, since it is larger than the sum of its proper divisors (554539730).

664737070 is a wasteful number, since it uses less digits than its factorization.

664737070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 664737070 is about 25782.4954184035. The cubic root of 664737070 is about 872.7368212898.

The spelling of 664737070 in words is "six hundred sixty-four million, seven hundred thirty-seven thousand, seventy".