2504988666 has 40 divisors (see below), whose sum is σ = 5794107264. Its totient is φ = 808059240.

The previous prime is 2504988653. The next prime is 2504988667. The reversal of 2504988666 is 6668894052.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2504988667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 244380 + ... + 254423.

Almost surely, 2^2504988666 is an apocalyptic number.

2504988666 is an abundant number, since it is smaller than the sum of its proper divisors (3289118598).

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

2504988666 is a wasteful number, since it uses less digits than its factorization.

2504988666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498848 (or 498839 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The square root of 2504988666 is about 50049.8617980110. The cubic root of 2504988666 is about 1358.1109633482.

The spelling of 2504988666 in words is "two billion, five hundred four million, nine hundred eighty-eight thousand, six hundred sixty-six".