1668617474315 has 16 divisors (see below), whose sum is σ = 2184759603936. Its totient is φ = 1213324627200.

The previous prime is 1668617474287. The next prime is 1668617474317. The reversal of 1668617474315 is 5134747168661.

It is not a de Polignac number, because 1668617474315 - 2²⁰ = 1668616425739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668617474317) 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, 2378852 + ... + 2999361.

It is an arithmetic number, because the mean of its divisors is an integer number (136547475246).

Almost surely, 2^{1668617474315} is an apocalyptic number.

1668617474315 is a deficient number, since it is larger than the sum of its proper divisors (516142129621).

1668617474315 is a wasteful number, since it uses less digits than its factorization.

1668617474315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383870.

The product of its digits is 20321280, while the sum is 59.

The spelling of 1668617474315 in words is "one trillion, six hundred sixty-eight billion, six hundred seventeen million, four hundred seventy-four thousand, three hundred fifteen".