2166272460 has 288 divisors, whose sum is σ = 7642252800. Its totient is φ = 491166720.

The previous prime is 2166272453. The next prime is 2166272483. The reversal of 2166272460 is 642726612.

2166272460 is a `hidden beast` number, since 2 + 1 + 6 + 627 + 24 + 6 + 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 polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3347857 + ... + 3348503.

It is an arithmetic number, because the mean of its divisors is an integer number (26535600).

Almost surely, 2^2166272460 is an apocalyptic number.

2166272460 is a gapful number since it is divisible by the number (20) 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 2166272460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3821126400).

2166272460 is an abundant number, since it is smaller than the sum of its proper divisors (5475980340).

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

2166272460 is a wasteful number, since it uses less digits than its factorization.

2166272460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 2166272460 is about 46543.2321610779. The cubic root of 2166272460 is about 1293.9108645454.

The spelling of 2166272460 in words is "two billion, one hundred sixty-six million, two hundred seventy-two thousand, four hundred sixty".