661134150 has 60 divisors (see below), whose sum is σ = 1836984732. Its totient is φ = 176301360.

The previous prime is 661134139. The next prime is 661134151. The reversal of 661134150 is 51431166.

661134150 is a `hidden beast` number, since 6 + 611 + 3 + 41 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661134151) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 77572 + ... + 85671.

Almost surely, 2^661134150 is an apocalyptic number.

661134150 is an abundant number, since it is smaller than the sum of its proper divisors (1175850582).

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

661134150 is a wasteful number, since it uses less digits than its factorization.

661134150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163267 (or 163253 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 661134150 is about 25712.5290471396. The cubic root of 661134150 is about 871.1571997051.

The spelling of 661134150 in words is "six hundred sixty-one million, one hundred thirty-four thousand, one hundred fifty".