660531481437 has 16 divisors (see below), whose sum is σ = 909198196160. Its totient is φ = 426232876032.

The previous prime is 660531481427. The next prime is 660531481439. The reversal of 660531481437 is 734184135066.

It is a happy number.

It is not a de Polignac number, because 660531481437 - 2³⁹ = 110775667549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660531481439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15394987 + ... + 15437832.

It is an arithmetic number, because the mean of its divisors is an integer number (56824887260).

Almost surely, 2^660531481437 is an apocalyptic number.

It is an amenable number.

660531481437 is a deficient number, since it is larger than the sum of its proper divisors (248666714723).

660531481437 is a wasteful number, since it uses less digits than its factorization.

660531481437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30833052.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 660531481437 in words is "six hundred sixty billion, five hundred thirty-one million, four hundred eighty-one thousand, four hundred thirty-seven".