661740833304 has 32 divisors (see below), whose sum is σ = 1838168982000. Its totient is φ = 220580277696.

The previous prime is 661740833279. The next prime is 661740833311. The reversal of 661740833304 is 403338047166.

It is a super-4 number, since 4×661740833304⁴ (a number of 48 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 661740833304.

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 7 ways as a sum of consecutive naturals, for example, 1531807269 + ... + 1531807700.

Almost surely, 2^661740833304 is an apocalyptic number.

It is an amenable number.

661740833304 is an abundant number, since it is smaller than the sum of its proper divisors (1176428148696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661740833304 is a wasteful number, since it uses less digits than its factorization.

661740833304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063614984 (or 3063614974 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 661740833304 in words is "six hundred sixty-one billion, seven hundred forty million, eight hundred thirty-three thousand, three hundred four".