666451125 has 96 divisors (see below), whose sum is σ = 1302837120. Its totient is φ = 336117600.

The previous prime is 666451099. The next prime is 666451129. The reversal of 666451125 is 521154666.

It is not a de Polignac number, because 666451125 - 2¹⁰ = 666450101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666451125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666451129) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1218102 + ... + 1218648.

It is an arithmetic number, because the mean of its divisors is an integer number (13571220).

Almost surely, 2^666451125 is an apocalyptic number.

It is an amenable number.

666451125 is a deficient number, since it is larger than the sum of its proper divisors (636385995).

666451125 is a wasteful number, since it uses less digits than its factorization.

666451125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 574 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 666451125 is about 25815.7146908622. The cubic root of 666451125 is about 873.4863080936.

The spelling of 666451125 in words is "six hundred sixty-six million, four hundred fifty-one thousand, one hundred twenty-five".