666733408942 has 16 divisors (see below), whose sum is σ = 1024733883600. Its totient is φ = 325159274560.

The previous prime is 666733408933. The next prime is 666733408967. The reversal of 666733408942 is 249804337666.

It is a happy number.

It is a congruent 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, 605317 + ... + 1303792.

It is an arithmetic number, because the mean of its divisors is an integer number (64045867725).

Almost surely, 2^666733408942 is an apocalyptic number.

666733408942 is a deficient number, since it is larger than the sum of its proper divisors (358000474658).

666733408942 is a wasteful number, since it uses less digits than its factorization.

666733408942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913411.

The product of its (nonzero) digits is 31352832, while the sum is 58.

The spelling of 666733408942 in words is "six hundred sixty-six billion, seven hundred thirty-three million, four hundred eight thousand, nine hundred forty-two".