159766666 has 16 divisors (see below), whose sum is σ = 246639456. Its totient is φ = 77562576.

The previous prime is 159766661. The next prime is 159766669. The reversal of 159766666 is 666667951.

It is not an unprimeable number, because it can be changed into a prime (159766661) 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, 38505 + ... + 42451.

It is an arithmetic number, because the mean of its divisors is an integer number (15414966).

Almost surely, 2^159766666 is an apocalyptic number.

159766666 is a deficient number, since it is larger than the sum of its proper divisors (86872790).

159766666 is a wasteful number, since it uses less digits than its factorization.

159766666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533.

The product of its digits is 2449440, while the sum is 52.

The square root of 159766666 is about 12639.8839393406. The cubic root of 159766666 is about 542.6194924619.

The spelling of 159766666 in words is "one hundred fifty-nine million, seven hundred sixty-six thousand, six hundred sixty-six".