2666523620 has 48 divisors (see below), whose sum is σ = 5715541440. Its totient is φ = 1044726144.

The previous prime is 2666523617. The next prime is 2666523679. The reversal of 2666523620 is 263256662.

It is a happy number.

It is a super-2 number, since 2×2666523620² = 14220696432035808800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234302 + ... + 245418.

It is an arithmetic number, because the mean of its divisors is an integer number (119073780).

Almost surely, 2^2666523620 is an apocalyptic number.

2666523620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666523620 is an abundant number, since it is smaller than the sum of its proper divisors (3049017820).

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

2666523620 is a wasteful number, since it uses less digits than its factorization.

2666523620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11372 (or 11370 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 2666523620 is about 51638.3928874631. The cubic root of 2666523620 is about 1386.6977525031.

The spelling of 2666523620 in words is "two billion, six hundred sixty-six million, five hundred twenty-three thousand, six hundred twenty".