2552512666 has 12 divisors (see below), whose sum is σ = 4208482026. Its totient is φ = 1160232920.

The previous prime is 2552512661. The next prime is 2552512679. The reversal of 2552512666 is 6662152552.

It can be written as a sum of positive squares in only one way, i.e., 1898432041 + 654080625 = 43571^2 + 25575^2 .

It is not an unprimeable number, because it can be changed into a prime (2552512661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5273545 + ... + 5274028.

Almost surely, 2^2552512666 is an apocalyptic number.

2552512666 is a deficient number, since it is larger than the sum of its proper divisors (1655969360).

2552512666 is a wasteful number, since it uses less digits than its factorization.

2552512666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547597 (or 10547586 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The square root of 2552512666 is about 50522.3976667775. The cubic root of 2552512666 is about 1366.6457924104.

The spelling of 2552512666 in words is "two billion, five hundred fifty-two million, five hundred twelve thousand, six hundred sixty-six".