666254265 has 16 divisors (see below), whose sum is σ = 1102766400. Its totient is φ = 343082432.

The previous prime is 666254249. The next prime is 666254287. The reversal of 666254265 is 562452666.

It is a cyclic number.

It is not a de Polignac number, because 666254265 - 2⁴ = 666254249 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 765375 + ... + 766244.

It is an arithmetic number, because the mean of its divisors is an integer number (68922900).

Almost surely, 2^666254265 is an apocalyptic number.

It is an amenable number.

666254265 is a deficient number, since it is larger than the sum of its proper divisors (436512135).

666254265 is a wasteful number, since it uses less digits than its factorization.

666254265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531656.

The product of its digits is 518400, while the sum is 42.

The square root of 666254265 is about 25811.9016153402. The cubic root of 666254265 is about 873.4002945601.

The spelling of 666254265 in words is "six hundred sixty-six million, two hundred fifty-four thousand, two hundred sixty-five".