166157006400 has 2016 divisors, whose sum is σ = 804281856000. Its totient is φ = 32572108800.

The previous prime is 166157006399. The next prime is 166157006437. The reversal of 166157006400 is 4600751661.

166157006400 is a `hidden beast` number, since 1 + 6 + 6 + 1 + 5 + 7 + 0 + 0 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 695217481 + ... + 695217719.

Almost surely, 2^166157006400 is an apocalyptic number.

166157006400 is a gapful number since it is divisible by the number (10) 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 166157006400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402140928000).

166157006400 is an abundant number, since it is smaller than the sum of its proper divisors (638124849600).

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

166157006400 is a wasteful number, since it uses less digits than its factorization.

166157006400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 166157006400 in words is "one hundred sixty-six billion, one hundred fifty-seven million, six thousand, four hundred".