666698792730 has 32 divisors (see below), whose sum is σ = 1643322432384. Its totient is φ = 172981308096.

The previous prime is 666698792681. The next prime is 666698792761. The reversal of 666698792730 is 37297896666.

It is a Curzon number.

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, 300313662 + ... + 300315881.

It is an arithmetic number, because the mean of its divisors is an integer number (51353826012).

Almost surely, 2^666698792730 is an apocalyptic number.

666698792730 is an abundant number, since it is smaller than the sum of its proper divisors (976623639654).

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

666698792730 is a wasteful number, since it uses less digits than its factorization.

666698792730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600629590.

The product of its (nonzero) digits is 246903552, while the sum is 69.

The spelling of 666698792730 in words is "six hundred sixty-six billion, six hundred ninety-eight million, seven hundred ninety-two thousand, seven hundred thirty".