664035970 has 32 divisors (see below), whose sum is σ = 1288450800. Its totient is φ = 244945920.

The previous prime is 664035961. The next prime is 664035979. The reversal of 664035970 is 79530466.

It is an interprime number because it is at equal distance from previous prime (664035961) and next prime (664035979).

It can be written as a sum of positive squares in 8 ways, for example, as 10569001 + 653466969 = 3251^2 + 25563^2 .

It is not an unprimeable number, because it can be changed into a prime (664035979) 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, 190806 + ... + 194254.

Almost surely, 2^664035970 is an apocalyptic number.

664035970 is a deficient number, since it is larger than the sum of its proper divisors (624414830).

664035970 is a wasteful number, since it uses less digits than its factorization.

664035970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4950.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 664035970 is about 25768.8953973584. The cubic root of 664035970 is about 872.4298873882.

The spelling of 664035970 in words is "six hundred sixty-four million, thirty-five thousand, nine hundred seventy".