166625536 has 144 divisors (see below), whose sum is σ = 423843840. Its totient is φ = 63498240.

The previous prime is 166625519. The next prime is 166625549. The reversal of 166625536 is 635526661.

It is a happy 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, 1557195 + ... + 1557301.

It is an arithmetic number, because the mean of its divisors is an integer number (2943360).

Almost surely, 2^166625536 is an apocalyptic number.

166625536 is a gapful number since it is divisible by the number (16) 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 166625536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211921920).

166625536 is an abundant number, since it is smaller than the sum of its proper divisors (257218304).

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

166625536 is a wasteful number, since it uses less digits than its factorization.

166625536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 206 counting only the distinct ones).

The product of its digits is 194400, while the sum is 40.

The square root of 166625536 is about 12908.3514051950. The cubic root of 166625536 is about 550.2759342683.

The spelling of 166625536 in words is "one hundred sixty-six million, six hundred twenty-five thousand, five hundred thirty-six".