159866646 has 32 divisors (see below), whose sum is σ = 343733760. Its totient is φ = 49408416.

The previous prime is 159866639. The next prime is 159866683. The reversal of 159866646 is 646668951.

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, 9561 + ... + 20276.

It is an arithmetic number, because the mean of its divisors is an integer number (10741680).

Almost surely, 2^159866646 is an apocalyptic number.

159866646 is an abundant number, since it is smaller than the sum of its proper divisors (183867114).

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

159866646 is a wasteful number, since it uses less digits than its factorization.

159866646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29908.

The product of its digits is 1866240, while the sum is 51.

The square root of 159866646 is about 12643.8382621734. The cubic root of 159866646 is about 542.7326570446.

The spelling of 159866646 in words is "one hundred fifty-nine million, eight hundred sixty-six thousand, six hundred forty-six".