661002364 has 48 divisors (see below), whose sum is σ = 1367283456. Its totient is φ = 276192000.

The previous prime is 661002337. The next prime is 661002383. The reversal of 661002364 is 463200166.

661002364 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 15 ways as a sum of consecutive naturals, for example, 21889 + ... + 42439.

It is an arithmetic number, because the mean of its divisors is an integer number (28485072).

Almost surely, 2^661002364 is an apocalyptic number.

It is an amenable number.

661002364 is an abundant number, since it is smaller than the sum of its proper divisors (706281092).

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

661002364 is a wasteful number, since it uses less digits than its factorization.

661002364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20626 (or 20624 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 661002364 is about 25709.9662387954. The cubic root of 661002364 is about 871.0993123349.

The spelling of 661002364 in words is "six hundred sixty-one million, two thousand, three hundred sixty-four".