356640666 has 16 divisors (see below), whose sum is σ = 737877600. Its totient is φ = 114780848.

The previous prime is 356640631. The next prime is 356640689. The reversal of 356640666 is 666046653.

It is a happy number.

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, 1024656 + ... + 1025003.

It is an arithmetic number, because the mean of its divisors is an integer number (46117350).

Almost surely, 2^356640666 is an apocalyptic number.

356640666 is an abundant number, since it is smaller than the sum of its proper divisors (381236934).

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

356640666 is a wasteful number, since it uses less digits than its factorization.

356640666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049693.

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 356640666 is about 18884.9322476942. The cubic root of 356640666 is about 709.1590029073.

The spelling of 356640666 in words is "three hundred fifty-six million, six hundred forty thousand, six hundred sixty-six".