661507362 has 12 divisors (see below), whose sum is σ = 1433265990. Its totient is φ = 220502448.

The previous prime is 661507361. The next prime is 661507381. The reversal of 661507362 is 263705166.

661507362 is a `hidden beast` number, since 6 + 615 + 0 + 7 + 36 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 661466961 + 40401 = 25719^2 + 201^2 .

It is not an unprimeable number, because it can be changed into a prime (661507361) 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, 18375187 + ... + 18375222.

Almost surely, 2^661507362 is an apocalyptic number.

661507362 is an abundant number, since it is smaller than the sum of its proper divisors (771758628).

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

661507362 is a wasteful number, since it uses less digits than its factorization.

661507362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36750417 (or 36750414 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 661507362 is about 25719.7854190116. The cubic root of 661507362 is about 871.3210923945.

The spelling of 661507362 in words is "six hundred sixty-one million, five hundred seven thousand, three hundred sixty-two".