159666647616 has 84 divisors (see below), whose sum is σ = 523035003712. Its totient is φ = 45619041024.

The previous prime is 159666647603. The next prime is 159666647641. The reversal of 159666647616 is 616746666951.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19795900 + ... + 19803963.

Almost surely, 2^159666647616 is an apocalyptic number.

159666647616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

159666647616 is an abundant number, since it is smaller than the sum of its proper divisors (363368356096).

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

159666647616 is a wasteful number, since it uses less digits than its factorization.

159666647616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39599888 (or 39599875 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 159666647616 in words is "one hundred fifty-nine billion, six hundred sixty-six million, six hundred forty-seven thousand, six hundred sixteen".