666140125 has 32 divisors (see below), whose sum is σ = 957116160. Its totient is φ = 453412800.

The previous prime is 666140107. The next prime is 666140129. The reversal of 666140125 is 521041666.

It is not a de Polignac number, because 666140125 - 2¹³ = 666131933 is a prime.

It is a super-2 number, since 2×666140125² = 887485332270031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666140129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118887 + ... + 124363.

It is an arithmetic number, because the mean of its divisors is an integer number (29909880).

Almost surely, 2^666140125 is an apocalyptic number.

It is an amenable number.

666140125 is a deficient number, since it is larger than the sum of its proper divisors (290976035).

666140125 is a wasteful number, since it uses less digits than its factorization.

666140125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638 (or 5628 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 666140125 is about 25809.6905250722. The cubic root of 666140125 is about 873.3504159036.

The spelling of 666140125 in words is "six hundred sixty-six million, one hundred forty thousand, one hundred twenty-five".