166245408 has 72 divisors (see below), whose sum is σ = 540304128. Its totient is φ = 47498112.

The previous prime is 166245389. The next prime is 166245427. The reversal of 166245408 is 804542661.

166245408 is a `hidden beast` number, since 1 + 6 + 6 + 245 + 408 = 666.

It is an interprime number because it is at equal distance from previous prime (166245389) and next prime (166245427).

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39216 + ... + 43247.

It is an arithmetic number, because the mean of its divisors is an integer number (7504224).

Almost surely, 2^166245408 is an apocalyptic number.

166245408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166245408 is an abundant number, since it is smaller than the sum of its proper divisors (374058720).

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

166245408 is a wasteful number, since it uses less digits than its factorization.

166245408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82486 (or 82475 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 166245408 is about 12893.6188868758. The cubic root of 166245408 is about 549.8571618054.

The spelling of 166245408 in words is "one hundred sixty-six million, two hundred forty-five thousand, four hundred eight".