2501151660 has 72 divisors (see below), whose sum is σ = 8670663456. Its totient is φ = 571691520.

The previous prime is 2501151649. The next prime is 2501151689. The reversal of 2501151660 is 661511052.

It is a happy number.

2501151660 is a `hidden beast` number, since 2 + 501 + 151 + 6 + 6 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991261 + ... + 993780.

Almost surely, 2^2501151660 is an apocalyptic number.

2501151660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2501151660 is an abundant number, since it is smaller than the sum of its proper divisors (6169511796).

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

2501151660 is a wasteful number, since it uses less digits than its factorization.

2501151660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985063 (or 1985058 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 2501151660 is about 50011.5152739847. The cubic root of 2501151660 is about 1357.4171820501.

The spelling of 2501151660 in words is "two billion, five hundred one million, one hundred fifty-one thousand, six hundred sixty".