166610664 has 96 divisors (see below), whose sum is σ = 495087840. Its totient is φ = 50198400.

The previous prime is 166610657. The next prime is 166610671. The reversal of 166610664 is 466016661.

It is an interprime number because it is at equal distance from previous prime (166610657) and next prime (166610671).

It is a super-2 number, since 2×166610664² = 55518226717041792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166614 + ... + 167610.

It is an arithmetic number, because the mean of its divisors is an integer number (5157165).

Almost surely, 2^166610664 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 166610664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247543920).

166610664 is an abundant number, since it is smaller than the sum of its proper divisors (328477176).

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

166610664 is a wasteful number, since it uses less digits than its factorization.

166610664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1224 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 166610664 is about 12907.7753311715. The cubic root of 166610664 is about 550.2595623336.

The spelling of 166610664 in words is "one hundred sixty-six million, six hundred ten thousand, six hundred sixty-four".