156666808990 has 8 divisors (see below), whose sum is σ = 282000256200. Its totient is φ = 62666723592.

The previous prime is 156666808981. The next prime is 156666809017. The reversal of 156666808990 is 99808666651.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7833340440 + ... + 7833340459.

It is an arithmetic number, because the mean of its divisors is an integer number (35250032025).

Almost surely, 2^156666808990 is an apocalyptic number.

156666808990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156666808990 is a deficient number, since it is larger than the sum of its proper divisors (125333447210).

156666808990 is a wasteful number, since it uses less digits than its factorization.

156666808990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15666680906.

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 156666808990 in words is "one hundred fifty-six billion, six hundred sixty-six million, eight hundred eight thousand, nine hundred ninety".