661834336 has 24 divisors (see below), whose sum is σ = 1310529024. Its totient is φ = 329001600.

The previous prime is 661834321. The next prime is 661834337. The reversal of 661834336 is 633438166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661834337) 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, 54240 + ... + 65311.

It is an arithmetic number, because the mean of its divisors is an integer number (54605376).

Almost surely, 2^661834336 is an apocalyptic number.

It is an amenable number.

661834336 is a deficient number, since it is larger than the sum of its proper divisors (648694688).

661834336 is a wasteful number, since it uses less digits than its factorization.

661834336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119734 (or 119726 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 661834336 is about 25726.1411019997. The cubic root of 661834336 is about 871.4646294290.

The spelling of 661834336 in words is "six hundred sixty-one million, eight hundred thirty-four thousand, three hundred thirty-six".