166667760 has 320 divisors, whose sum is σ = 669480960. Its totient is φ = 37324800.

The previous prime is 166667759. The next prime is 166667771. The reversal of 166667760 is 67766661.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1103685 + ... + 1103835.

It is an arithmetic number, because the mean of its divisors is an integer number (2092128).

Almost surely, 2^166667760 is an apocalyptic number.

166667760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166667760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334740480).

166667760 is an abundant number, since it is smaller than the sum of its proper divisors (502813200).

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

166667760 is a wasteful number, since it uses less digits than its factorization.

166667760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 166667760 is about 12909.9868319065. The cubic root of 166667760 is about 550.3224115155.

The spelling of 166667760 in words is "one hundred sixty-six million, six hundred sixty-seven thousand, seven hundred sixty".