660156538513951 has 8 divisors (see below), whose sum is σ = 660378875447600. Its totient is φ = 659934205943040.

The previous prime is 660156538513883. The next prime is 660156538513973. The reversal of 660156538513951 is 159315835651066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660156538513951 - 2¹³ = 660156538505759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660156538513651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317211940 + ... + 319286278.

It is an arithmetic number, because the mean of its divisors is an integer number (82547359430950).

Almost surely, 2^{660156538513951} is an apocalyptic number.

660156538513951 is a deficient number, since it is larger than the sum of its proper divisors (222336933649).

660156538513951 is a wasteful number, since it uses less digits than its factorization.

660156538513951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181369.

The product of its (nonzero) digits is 87480000, while the sum is 64.

The spelling of 660156538513951 in words is "six hundred sixty trillion, one hundred fifty-six billion, five hundred thirty-eight million, five hundred thirteen thousand, nine hundred fifty-one".