666627652 has 12 divisors (see below), whose sum is σ = 1174030060. Its totient is φ = 331190496.

The previous prime is 666627623. The next prime is 666627659. The reversal of 666627652 is 256726666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56340036 + 610287616 = 7506^2 + 24704^2 .

It is a super-2 number, since 2×666627652² = 888784852822066208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666627659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530127 + ... + 531382.

Almost surely, 2^666627652 is an apocalyptic number.

It is an amenable number.

666627652 is a deficient number, since it is larger than the sum of its proper divisors (507402408).

666627652 is a wasteful number, since it uses less digits than its factorization.

666627652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061670 (or 1061668 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The square root of 666627652 is about 25819.1334478909. The cubic root of 666627652 is about 873.5634231785.

The spelling of 666627652 in words is "six hundred sixty-six million, six hundred twenty-seven thousand, six hundred fifty-two".