660506166 has 24 divisors (see below), whose sum is σ = 1469776464. Its totient is φ = 214218000.

The previous prime is 660506159. The next prime is 660506173. The reversal of 660506166 is 661605066.

It is an interprime number because it is at equal distance from previous prime (660506159) and next prime (660506173).

It is a self number, because there is not a number n which added to its sum of digits gives 660506166.

It is a congruent number.

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, 495210 + ... + 496541.

It is an arithmetic number, because the mean of its divisors is an integer number (61240686).

Almost surely, 2^660506166 is an apocalyptic number.

660506166 is an abundant number, since it is smaller than the sum of its proper divisors (809270298).

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

660506166 is a wasteful number, since it uses less digits than its factorization.

660506166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991796 (or 991793 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 660506166 is about 25700.3145116942. The cubic root of 660506166 is about 870.8812869228.

The spelling of 660506166 in words is "six hundred sixty million, five hundred six thousand, one hundred sixty-six".