166389206400 has 192 divisors, whose sum is σ = 608938592400. Its totient is φ = 44370432000.

The previous prime is 166389206393. The next prime is 166389206437. The reversal of 166389206400 is 4602983661.

166389206400 is a `hidden beast` number, since 1 + 6 + 6 + 38 + 9 + 206 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876501 + ... + 1049300.

Almost surely, 2^166389206400 is an apocalyptic number.

166389206400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166389206400 is an abundant number, since it is smaller than the sum of its proper divisors (442549386000).

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

166389206400 is a wasteful number, since it uses less digits than its factorization.

166389206400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925834 (or 1925811 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 166389206400 in words is "one hundred sixty-six billion, three hundred eighty-nine million, two hundred six thousand, four hundred".