2666520012 has 48 divisors (see below), whose sum is σ = 6704391680. Its totient is φ = 819989568.

The previous prime is 2666519981. The next prime is 2666520013. The reversal of 2666520012 is 2100256662.

It is a super-2 number, since 2×2666520012² = 14220657948792960288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666520013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339789 + ... + 347547.

Almost surely, 2^2666520012 is an apocalyptic number.

It is an amenable number.

2666520012 is an abundant number, since it is smaller than the sum of its proper divisors (4037871668).

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

2666520012 is a wasteful number, since it uses less digits than its factorization.

2666520012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9982 (or 9980 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2666520012 is about 51638.3579522045. The cubic root of 2666520012 is about 1386.6971270686.

Adding to 2666520012 its reverse (2100256662), we get a palindrome (4766776674).

The spelling of 2666520012 in words is "two billion, six hundred sixty-six million, five hundred twenty thousand, twelve".