660441537 has 24 divisors (see below), whose sum is σ = 1094333760. Its totient is φ = 375982560.

The previous prime is 660441521. The next prime is 660441547. The reversal of 660441537 is 735144066.

It is a happy number.

660441537 is a `hidden beast` number, since 6 + 604 + 4 + 15 + 37 = 666.

660441537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660441537 - 2⁴ = 660441521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660441547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2539 + ... + 36432.

It is an arithmetic number, because the mean of its divisors is an integer number (45597240).

Almost surely, 2^660441537 is an apocalyptic number.

It is an amenable number.

660441537 is a deficient number, since it is larger than the sum of its proper divisors (433892223).

660441537 is a wasteful number, since it uses less digits than its factorization.

660441537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39253 (or 39250 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 660441537 is about 25699.0571227818. The cubic root of 660441537 is about 870.8528814234.

The spelling of 660441537 in words is "six hundred sixty million, four hundred forty-one thousand, five hundred thirty-seven".