661013514 has 64 divisors (see below), whose sum is σ = 1751777280. Its totient is φ = 180647280.

The previous prime is 661013503. The next prime is 661013519. The reversal of 661013514 is 415310166.

661013514 is a `hidden beast` number, since 6 + 610 + 1 + 35 + 14 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (661013519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29322 + ... + 46709.

It is an arithmetic number, because the mean of its divisors is an integer number (27371520).

Almost surely, 2^661013514 is an apocalyptic number.

661013514 is an abundant number, since it is smaller than the sum of its proper divisors (1090763766).

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

661013514 is a wasteful number, since it uses less digits than its factorization.

661013514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76072 (or 76066 counting only the distinct ones).

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

The square root of 661013514 is about 25710.1830798616. The cubic root of 661013514 is about 871.1042103016.

The spelling of 661013514 in words is "six hundred sixty-one million, thirteen thousand, five hundred fourteen".