661560150 has 48 divisors (see below), whose sum is σ = 1693605888. Its totient is φ = 170724000.

The previous prime is 661560127. The next prime is 661560167. The reversal of 661560150 is 51065166.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66486 + ... + 75785.

It is an arithmetic number, because the mean of its divisors is an integer number (35283456).

Almost surely, 2^661560150 is an apocalyptic number.

661560150 is an abundant number, since it is smaller than the sum of its proper divisors (1032045738).

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

661560150 is a wasteful number, since it uses less digits than its factorization.

661560150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142317 (or 142312 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 661560150 is about 25720.8116123889. The cubic root of 661560150 is about 871.3442687928.

The spelling of 661560150 in words is "six hundred sixty-one million, five hundred sixty thousand, one hundred fifty".