660747398 has 16 divisors (see below), whose sum is σ = 1052364960. Its totient is φ = 310068096.

The previous prime is 660747383. The next prime is 660747403. The reversal of 660747398 is 893747066.

It is a congruent number.

It is an unprimeable number.

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, 14861 + ... + 39272.

It is an arithmetic number, because the mean of its divisors is an integer number (65772810).

Almost surely, 2^660747398 is an apocalyptic number.

660747398 is a deficient number, since it is larger than the sum of its proper divisors (391617562).

660747398 is a wasteful number, since it uses less digits than its factorization.

660747398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54511.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 660747398 is about 25705.0072553968. The cubic root of 660747398 is about 870.9872959579.

The spelling of 660747398 in words is "six hundred sixty million, seven hundred forty-seven thousand, three hundred ninety-eight".