666255150660 has 192 divisors, whose sum is σ = 2118701733120. Its totient is φ = 154952878080.

The previous prime is 666255150643. The next prime is 666255150683. The reversal of 666255150660 is 66051552666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2894122 + ... + 3115838.

It is an arithmetic number, because the mean of its divisors is an integer number (11034904860).

Almost surely, 2^666255150660 is an apocalyptic number.

666255150660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666255150660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059350866560).

666255150660 is an abundant number, since it is smaller than the sum of its proper divisors (1452446582460).

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

666255150660 is a wasteful number, since it uses less digits than its factorization.

666255150660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221926 (or 221924 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 666255150660 in words is "six hundred sixty-six billion, two hundred fifty-five million, one hundred fifty thousand, six hundred sixty".