166504321451632 has 240 divisors, whose sum is σ = 363434606196480. Its totient is φ = 73615685490688.

The previous prime is 166504321451623. The next prime is 166504321451641. The reversal of 166504321451632 is 236154123405661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166504321451623) and next prime (166504321451641).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10891882293 + ... + 10891897579.

It is an arithmetic number, because the mean of its divisors is an integer number (1514310859152).

Almost surely, 2^{166504321451632} 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 166504321451632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181717303098240).

166504321451632 is an abundant number, since it is smaller than the sum of its proper divisors (196930284744848).

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

166504321451632 is a wasteful number, since it uses less digits than its factorization.

166504321451632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16700 (or 16671 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 166504321451632 in words is "one hundred sixty-six trillion, five hundred four billion, three hundred twenty-one million, four hundred fifty-one thousand, six hundred thirty-two".