665552630 has 16 divisors (see below), whose sum is σ = 1209857904. Its totient is φ = 263584800.

The previous prime is 665552611. The next prime is 665552647. The reversal of 665552630 is 36255566.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328472 + ... + 330491.

It is an arithmetic number, because the mean of its divisors is an integer number (75616119).

Almost surely, 2^665552630 is an apocalyptic number.

665552630 is a deficient number, since it is larger than the sum of its proper divisors (544305274).

665552630 is a wasteful number, since it uses less digits than its factorization.

665552630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659071.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 665552630 is about 25798.3067273804. The cubic root of 665552630 is about 873.0935931046.

The spelling of 665552630 in words is "six hundred sixty-five million, five hundred fifty-two thousand, six hundred thirty".