661564000350 has 72 divisors (see below), whose sum is σ = 1938983957352. Its totient is φ = 160379150400.

The previous prime is 661564000343. The next prime is 661564000397. The reversal of 661564000350 is 53000465166.

661564000350 is a `hidden beast` number, since 6 + 6 + 1 + 5 + 640 + 0 + 0 + 3 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66819697 + ... + 66829596.

It is an arithmetic number, because the mean of its divisors is an integer number (26930332741).

Almost surely, 2^661564000350 is an apocalyptic number.

661564000350 is an abundant number, since it is smaller than the sum of its proper divisors (1277419957002).

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

661564000350 is a wasteful number, since it uses less digits than its factorization.

661564000350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133649322 (or 133649314 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 661564000350 in words is "six hundred sixty-one billion, five hundred sixty-four million, three hundred fifty", and thus it is an aban number.