660725238971 has 16 divisors (see below), whose sum is σ = 775011191808. Its totient is φ = 551466273600.

The previous prime is 660725238937. The next prime is 660725238989. The reversal of 660725238971 is 179832527066.

It is a cyclic number.

It is not a de Polignac number, because 660725238971 - 2¹⁸ = 660724976827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660725238571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2050835 + ... + 2351036.

It is an arithmetic number, because the mean of its divisors is an integer number (48438199488).

Almost surely, 2^660725238971 is an apocalyptic number.

660725238971 is a deficient number, since it is larger than the sum of its proper divisors (114285952837).

660725238971 is a wasteful number, since it uses less digits than its factorization.

660725238971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402442.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 660725238971 in words is "six hundred sixty billion, seven hundred twenty-five million, two hundred thirty-eight thousand, nine hundred seventy-one".