665796850 has 12 divisors (see below), whose sum is σ = 1238382234. Its totient is φ = 266318720.

The previous prime is 665796839. The next prime is 665796851. The reversal of 665796850 is 58697566.

It can be written as a sum of positive squares in 3 ways, for example, as 457831609 + 207965241 = 21397^2 + 14421^2 .

It is not an unprimeable number, because it can be changed into a prime (665796851) 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, 6657919 + ... + 6658018.

Almost surely, 2^665796850 is an apocalyptic number.

665796850 is a deficient number, since it is larger than the sum of its proper divisors (572585384).

665796850 is a wasteful number, since it uses less digits than its factorization.

665796850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315949 (or 13315944 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The square root of 665796850 is about 25803.0395496345. The cubic root of 665796850 is about 873.2003719589.

The spelling of 665796850 in words is "six hundred sixty-five million, seven hundred ninety-six thousand, eight hundred fifty".