661012350 has 24 divisors (see below), whose sum is σ = 1639311000. Its totient is φ = 176269920.

The previous prime is 661012327. The next prime is 661012351. The reversal of 661012350 is 53210166.

It is a self number, because there is not a number n which added to its sum of digits gives 661012350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661012351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2203225 + ... + 2203524.

It is an arithmetic number, because the mean of its divisors is an integer number (68304625).

Almost surely, 2^661012350 is an apocalyptic number.

661012350 is an abundant number, since it is smaller than the sum of its proper divisors (978298650).

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

661012350 is a wasteful number, since it uses less digits than its factorization.

661012350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406764 (or 4406759 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 661012350 is about 25710.1604429066. The cubic root of 661012350 is about 871.1036989828.

The spelling of 661012350 in words is "six hundred sixty-one million, twelve thousand, three hundred fifty".