666151043530542 has 32 divisors (see below), whose sum is σ = 1397214336499200. Its totient is φ = 211328668378080.

The previous prime is 666151043530513. The next prime is 666151043530603. The reversal of 666151043530542 is 245035340151666.

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 15 ways as a sum of consecutive naturals, for example, 12128569209 + ... + 12128624132.

It is an arithmetic number, because the mean of its divisors is an integer number (43662948015600).

Almost surely, 2^{666151043530542} is an apocalyptic number.

666151043530542 is an abundant number, since it is smaller than the sum of its proper divisors (731063292968658).

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

666151043530542 is a wasteful number, since it uses less digits than its factorization.

666151043530542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257193568.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 666151043530542 in words is "six hundred sixty-six trillion, one hundred fifty-one billion, forty-three million, five hundred thirty thousand, five hundred forty-two".