666070730 has 16 divisors (see below), whose sum is σ = 1291152744. Its totient is φ = 245933760.

The previous prime is 666070721. The next prime is 666070771. The reversal of 666070730 is 37070666.

It can be written as a sum of positive squares in 4 ways, for example, as 169182049 + 496888681 = 13007^2 + 22291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561681 + ... + 2561940.

Almost surely, 2^666070730 is an apocalyptic number.

666070730 is a deficient number, since it is larger than the sum of its proper divisors (625082014).

666070730 is a wasteful number, since it uses less digits than its factorization.

666070730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123641.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 666070730 is about 25808.3461306609. The cubic root of 666070730 is about 873.3200878217.

The spelling of 666070730 in words is "six hundred sixty-six million, seventy thousand, seven hundred thirty".