665942630 has 8 divisors (see below), whose sum is σ = 1198696752. Its totient is φ = 266377048.

The previous prime is 665942611. The next prime is 665942653. The reversal of 665942630 is 36249566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33297122 + ... + 33297141.

It is an arithmetic number, because the mean of its divisors is an integer number (149837094).

Almost surely, 2^665942630 is an apocalyptic number.

665942630 is a deficient number, since it is larger than the sum of its proper divisors (532754122).

665942630 is a wasteful number, since it uses less digits than its factorization.

665942630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66594270.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 665942630 is about 25805.8642560175. The cubic root of 665942630 is about 873.2640980342.

The spelling of 665942630 in words is "six hundred sixty-five million, nine hundred forty-two thousand, six hundred thirty".