660747397 has 8 divisors (see below), whose sum is σ = 683848800. Its totient is φ = 637667184.

The previous prime is 660747383. The next prime is 660747403. The reversal of 660747397 is 793747066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660747397 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 660747397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660747697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83778 + ... + 91324.

It is an arithmetic number, because the mean of its divisors is an integer number (85481100).

Almost surely, 2^660747397 is an apocalyptic number.

It is an amenable number.

660747397 is a deficient number, since it is larger than the sum of its proper divisors (23101403).

660747397 is a wasteful number, since it uses less digits than its factorization.

660747397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595.

The product of its (nonzero) digits is 1333584, while the sum is 49.

The square root of 660747397 is about 25705.0072359453. The cubic root of 660747397 is about 870.9872955185.

The spelling of 660747397 in words is "six hundred sixty million, seven hundred forty-seven thousand, three hundred ninety-seven".