166550040 has 64 divisors (see below), whose sum is σ = 555170400. Its totient is φ = 44413056.

The previous prime is 166550023. The next prime is 166550047. The reversal of 166550040 is 40055661.

It is a happy number.

166550040 is a `hidden beast` number, since 1 + 6 + 655 + 0 + 0 + 4 + 0 = 666.

166550040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 166549986 and 166550013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166550047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76027 + ... + 78186.

Almost surely, 2^166550040 is an apocalyptic number.

166550040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166550040 is an abundant number, since it is smaller than the sum of its proper divisors (388620360).

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

166550040 is a wasteful number, since it uses less digits than its factorization.

166550040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154233 (or 154223 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 166550040 is about 12905.4267655123. The cubic root of 166550040 is about 550.1928139399.

The spelling of 166550040 in words is "one hundred sixty-six million, five hundred fifty thousand, forty".