2501666628 has 24 divisors (see below), whose sum is σ = 5863404288. Its totient is φ = 830148576.

The previous prime is 2501666623. The next prime is 2501666633. The reversal of 2501666628 is 8266661052.

It is an interprime number because it is at equal distance from previous prime (2501666623) and next prime (2501666633).

It is a self number, because there is not a number n which added to its sum of digits gives 2501666628.

It is not an unprimeable number, because it can be changed into a prime (2501666623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464751 + ... + 470102.

It is an arithmetic number, because the mean of its divisors is an integer number (244308512).

Almost surely, 2^2501666628 is an apocalyptic number.

It is an amenable number.

2501666628 is an abundant number, since it is smaller than the sum of its proper divisors (3361737660).

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

2501666628 is a wasteful number, since it uses less digits than its factorization.

2501666628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935083 (or 935081 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 2501666628 is about 50016.6635032766. The cubic root of 2501666628 is about 1357.5103362630.

The spelling of 2501666628 in words is "two billion, five hundred one million, six hundred sixty-six thousand, six hundred twenty-eight".