661500050 has 12 divisors (see below), whose sum is σ = 1230390186. Its totient is φ = 264600000.

The previous prime is 661500031. The next prime is 661500053. The reversal of 661500050 is 50005166.

661500050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 593750689 + 67749361 = 24367^2 + 8231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 661499989 and 661500025.

It is not an unprimeable number, because it can be changed into a prime (661500053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6614951 + ... + 6615050.

Almost surely, 2^661500050 is an apocalyptic number.

661500050 is a deficient number, since it is larger than the sum of its proper divisors (568890136).

661500050 is a wasteful number, since it uses less digits than its factorization.

661500050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230013 (or 13230008 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 661500050 is about 25719.6432712431. The cubic root of 661500050 is about 871.3178819876.

The spelling of 661500050 in words is "six hundred sixty-one million, five hundred thousand, fifty".