166637371392 has 512 divisors, whose sum is σ = 543573504000. Its totient is φ = 50217615360.

The previous prime is 166637371363. The next prime is 166637371403. The reversal of 166637371392 is 293173736661.

It is a happy number.

166637371392 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (512).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 386629417 + ... + 386629847.

It is an arithmetic number, because the mean of its divisors is an integer number (1061667000).

Almost surely, 2^166637371392 is an apocalyptic number.

166637371392 is a gapful number since it is divisible by the number (12) 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 166637371392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271786752000).

166637371392 is an abundant number, since it is smaller than the sum of its proper divisors (376936132608).

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

166637371392 is an equidigital number, since it uses as much as digits as its factorization.

166637371392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 478 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The spelling of 166637371392 in words is "one hundred sixty-six billion, six hundred thirty-seven million, three hundred seventy-one thousand, three hundred ninety-two".