666216150 has 24 divisors (see below), whose sum is σ = 1652216424. Its totient is φ = 177657600.

The previous prime is 666216143. The next prime is 666216169. The reversal of 666216150 is 51612666.

It is a Curzon number.

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, 2220571 + ... + 2220870.

It is an arithmetic number, because the mean of its divisors is an integer number (68842351).

Almost surely, 2^666216150 is an apocalyptic number.

666216150 is an abundant number, since it is smaller than the sum of its proper divisors (986000274).

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

666216150 is a wasteful number, since it uses less digits than its factorization.

666216150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441456 (or 4441451 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 666216150 is about 25811.1632825799. The cubic root of 666216150 is about 873.3836391135.

It can be divided in two parts, 66621 and 6150, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 666216150 in words is "six hundred sixty-six million, two hundred sixteen thousand, one hundred fifty".