166766464 has 64 divisors (see below), whose sum is σ = 354605040. Its totient is φ = 77848576.

The previous prime is 166766429. The next prime is 166766473. The reversal of 166766464 is 464667661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×166766464² = 55622107030126592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376227 + ... + 376669.

Almost surely, 2^166766464 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 166766464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177302520).

166766464 is an abundant number, since it is smaller than the sum of its proper divisors (187838576).

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

166766464 is a wasteful number, since it uses less digits than its factorization.

166766464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 635 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 166766464 is about 12913.8090430361. The cubic root of 166766464 is about 550.4310274108.

The spelling of 166766464 in words is "one hundred sixty-six million, seven hundred sixty-six thousand, four hundred sixty-four".