166137666240 has 224 divisors, whose sum is σ = 649215221760. Its totient is φ = 35053203456.

The previous prime is 166137666209. The next prime is 166137666269. The reversal of 166137666240 is 42666731661.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 166137666240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863520 + ... + 1038239.

It is an arithmetic number, because the mean of its divisors is an integer number (2898282240).

Almost surely, 2^166137666240 is an apocalyptic number.

166137666240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166137666240 is an abundant number, since it is smaller than the sum of its proper divisors (483077555520).

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

166137666240 is a wasteful number, since it uses less digits than its factorization.

166137666240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901799 (or 1901789 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 166137666240 in words is "one hundred sixty-six billion, one hundred thirty-seven million, six hundred sixty-six thousand, two hundred forty".