660066417 has 6 divisors (see below), whose sum is σ = 953429282. Its totient is φ = 440044272.

The previous prime is 660066389. The next prime is 660066439. The reversal of 660066417 is 714660066.

660066417 is a `hidden beast` number, since 6 + 6 + 0 + 0 + 6 + 641 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 591656976 + 68409441 = 24324^2 + 8271^2 .

It is not a de Polignac number, because 660066417 - 2⁸ = 660066161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660066457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36670348 + ... + 36670365.

Almost surely, 2^660066417 is an apocalyptic number.

It is an amenable number.

660066417 is a deficient number, since it is larger than the sum of its proper divisors (293362865).

660066417 is a wasteful number, since it uses less digits than its factorization.

660066417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73340719 (or 73340716 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 660066417 is about 25691.7577639211. The cubic root of 660066417 is about 870.6879734627.

The spelling of 660066417 in words is "six hundred sixty million, sixty-six thousand, four hundred seventeen".