8166826620 has 384 divisors, whose sum is σ = 28036915200. Its totient is φ = 1990344960.

The previous prime is 8166826573. The next prime is 8166826631. The reversal of 8166826620 is 266286618.

8166826620 is a `hidden beast` number, since 8 + 16 + 6 + 8 + 2 + 6 + 620 = 666.

It is a super-2 number, since 2×8166826620² (a number of 21 digits) contains 22 as substring.

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 127 ways as a sum of consecutive naturals, for example, 25762702 + ... + 25763018.

It is an arithmetic number, because the mean of its divisors is an integer number (73012800).

Almost surely, 2^8166826620 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 8166826620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14018457600).

8166826620 is an abundant number, since it is smaller than the sum of its proper divisors (19870088580).

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

8166826620 is a wasteful number, since it uses less digits than its factorization.

8166826620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 8166826620 is about 90370.4964023104. The cubic root of 8166826620 is about 2013.8066867099.

The spelling of 8166826620 in words is "eight billion, one hundred sixty-six million, eight hundred twenty-six thousand, six hundred twenty".