166138648 has 32 divisors (see below), whose sum is σ = 336036960. Its totient is φ = 76550400.

The previous prime is 166138619. The next prime is 166138673. The reversal of 166138648 is 846831661.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91348 + ... + 93148.

It is an arithmetic number, because the mean of its divisors is an integer number (10501155).

Almost surely, 2^166138648 is an apocalyptic number.

It is an amenable number.

166138648 is an abundant number, since it is smaller than the sum of its proper divisors (169898312).

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

166138648 is a wasteful number, since it uses less digits than its factorization.

166138648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707 (or 2703 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 166138648 is about 12889.4781895932. The cubic root of 166138648 is about 549.7394335991.

The spelling of 166138648 in words is "one hundred sixty-six million, one hundred thirty-eight thousand, six hundred forty-eight".