8166506400 has 576 divisors, whose sum is σ = 32197939200. Its totient is φ = 1985679360.

The previous prime is 8166506371. The next prime is 8166506441. The reversal of 8166506400 is 46056618.

8166506400 is a `hidden beast` number, since 8 + 1 + 6 + 6 + 5 + 0 + 640 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35661486 + ... + 35661714.

It is an arithmetic number, because the mean of its divisors is an integer number (55899200).

Almost surely, 2^8166506400 is an apocalyptic number.

8166506400 is a gapful number since it is divisible by the number (80) 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 8166506400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16098969600).

8166506400 is an abundant number, since it is smaller than the sum of its proper divisors (24031432800).

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

8166506400 is a wasteful number, since it uses less digits than its factorization.

8166506400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 8166506400 is about 90368.7246783974. The cubic root of 8166506400 is about 2013.7803660170.

The spelling of 8166506400 in words is "eight billion, one hundred sixty-six million, five hundred six thousand, four hundred".