664070242 has 32 divisors (see below), whose sum is σ = 1127706624. Its totient is φ = 290648400.

The previous prime is 664070233. The next prime is 664070257. The reversal of 664070242 is 242070466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62223 + ... + 72109.

It is an arithmetic number, because the mean of its divisors is an integer number (35240832).

Almost surely, 2^664070242 is an apocalyptic number.

664070242 is a deficient number, since it is larger than the sum of its proper divisors (463636382).

664070242 is a wasteful number, since it uses less digits than its factorization.

664070242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10014.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 664070242 is about 25769.5603765373. The cubic root of 664070242 is about 872.4448963155. Note that the first 3 decimals are identical.

The spelling of 664070242 in words is "six hundred sixty-four million, seventy thousand, two hundred forty-two".