660747497 has 8 divisors (see below), whose sum is σ = 663737760. Its totient is φ = 657764800.

The previous prime is 660747491. The next prime is 660747539. The reversal of 660747497 is 794747066.

660747497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-660747497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660747491) 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, 234497 + ... + 237297.

It is an arithmetic number, because the mean of its divisors is an integer number (82967220).

Almost surely, 2^660747497 is an apocalyptic number.

It is an amenable number.

660747497 is a deficient number, since it is larger than the sum of its proper divisors (2990263).

660747497 is a wasteful number, since it uses less digits than its factorization.

660747497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The square root of 660747497 is about 25705.0091810915. The cubic root of 660747497 is about 870.9873394580.

The spelling of 660747497 in words is "six hundred sixty million, seven hundred forty-seven thousand, four hundred ninety-seven".