166163664 has 80 divisors (see below), whose sum is σ = 454970880. Its totient is φ = 52110720.

The previous prime is 166163651. The next prime is 166163677. The reversal of 166163664 is 466361661.

It is an interprime number because it is at equal distance from previous prime (166163651) and next prime (166163677).

It is a super-2 number, since 2×166163664² = 55220726467809792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151759 + ... + 152849.

It is an arithmetic number, because the mean of its divisors is an integer number (5687136).

Almost surely, 2^166163664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166163664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227485440).

166163664 is an abundant number, since it is smaller than the sum of its proper divisors (288807216).

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

166163664 is a wasteful number, since it uses less digits than its factorization.

166163664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1282 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 166163664 is about 12890.4485569743. The cubic root of 166163664 is about 549.7670241922.

The spelling of 166163664 in words is "one hundred sixty-six million, one hundred sixty-three thousand, six hundred sixty-four".