2666520180 has 288 divisors, whose sum is σ = 8856207360. Its totient is φ = 647412480.

The previous prime is 2666520179. The next prime is 2666520209. The reversal of 2666520180 is 810256662.

It is a super-2 number, since 2×2666520180² = 14220659740694464800, which contains 22 as substring.

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

It is a congruent number.

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, 10138729 + ... + 10138991.

It is an arithmetic number, because the mean of its divisors is an integer number (30750720).

Almost surely, 2^2666520180 is an apocalyptic number.

2666520180 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 2666520180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4428103680).

2666520180 is an abundant number, since it is smaller than the sum of its proper divisors (6189687180).

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

2666520180 is a wasteful number, since it uses less digits than its factorization.

2666520180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 406 counting only the distinct ones).

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

The square root of 2666520180 is about 51638.3595789022. The cubic root of 2666520180 is about 1386.6971561908.

The spelling of 2666520180 in words is "two billion, six hundred sixty-six million, five hundred twenty thousand, one hundred eighty".