660929983 has 12 divisors (see below), whose sum is σ = 779669712. Its totient is φ = 558529440.

The previous prime is 660929959. The next prime is 660929989. The reversal of 660929983 is 389929066.

It is a happy number.

It is not a de Polignac number, because 660929983 - 2¹³ = 660921791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660929983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660929989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91510 + ... + 98467.

It is an arithmetic number, because the mean of its divisors is an integer number (64972476).

Almost surely, 2^660929983 is an apocalyptic number.

660929983 is a deficient number, since it is larger than the sum of its proper divisors (118739729).

660929983 is a wasteful number, since it uses less digits than its factorization.

660929983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190062 (or 190055 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 660929983 is about 25708.5585554694. The cubic root of 660929983 is about 871.0675155041.

The spelling of 660929983 in words is "six hundred sixty million, nine hundred twenty-nine thousand, nine hundred eighty-three".