661012299941232 has 20 divisors (see below), whose sum is σ = 1707615108181640. Its totient is φ = 220337433313728.

The previous prime is 661012299941219. The next prime is 661012299941281. The reversal of 661012299941232 is 232149992210166.

661012299941232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6885544791007 + ... + 6885544791102.

It is an arithmetic number, because the mean of its divisors is an integer number (85380755409082).

Almost surely, 2^{661012299941232} is an apocalyptic number.

It is an amenable number.

661012299941232 is an abundant number, since it is smaller than the sum of its proper divisors (1046602808240408).

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

661012299941232 is a wasteful number, since it uses less digits than its factorization.

661012299941232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13771089582120 (or 13771089582114 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 661012299941232 in words is "six hundred sixty-one trillion, twelve billion, two hundred ninety-nine million, nine hundred forty-one thousand, two hundred thirty-two".