166915208824 has 256 divisors, whose sum is σ = 409473792000. Its totient is φ = 62018611200.

The previous prime is 166915208813. The next prime is 166915208843. The reversal of 166915208824 is 428802519661.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 128296974 + ... + 128298274.

It is an arithmetic number, because the mean of its divisors is an integer number (1599507000).

Almost surely, 2^166915208824 is an apocalyptic number.

166915208824 is a gapful number since it is divisible by the number (14) 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 166915208824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204736896000).

166915208824 is an abundant number, since it is smaller than the sum of its proper divisors (242558583176).

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

166915208824 is a wasteful number, since it uses less digits than its factorization.

166915208824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 166915208824 in words is "one hundred sixty-six billion, nine hundred fifteen million, two hundred eight thousand, eight hundred twenty-four".