660692401540 has 24 divisors (see below), whose sum is σ = 1408162315392. Its totient is φ = 260332527840.

The previous prime is 660692401531. The next prime is 660692401543. The reversal of 660692401540 is 45104296066.

It is not an unprimeable number, because it can be changed into a prime (660692401543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246525676 + ... + 246528355.

It is an arithmetic number, because the mean of its divisors is an integer number (58673429808).

Almost surely, 2^660692401540 is an apocalyptic number.

It is an amenable number.

660692401540 is an abundant number, since it is smaller than the sum of its proper divisors (747469913852).

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

660692401540 is a wasteful number, since it uses less digits than its factorization.

660692401540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493054107 (or 493054105 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 660692401540 in words is "six hundred sixty billion, six hundred ninety-two million, four hundred one thousand, five hundred forty".