166055551600 has 30 divisors (see below), whose sum is σ = 398948463680. Its totient is φ = 66422220480.

The previous prime is 166055551589. The next prime is 166055551603. The reversal of 166055551600 is 6155550661.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166055551603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207569040 + ... + 207569839.

Almost surely, 2^166055551600 is an apocalyptic number.

166055551600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166055551600 is an abundant number, since it is smaller than the sum of its proper divisors (232892912080).

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

166055551600 is a wasteful number, since it uses less digits than its factorization.

166055551600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415138897 (or 415138886 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 166055551600 in words is "one hundred sixty-six billion, fifty-five million, five hundred fifty-one thousand, six hundred".