3899746081668 has 48 divisors (see below), whose sum is σ = 9618400512000. Its totient is φ = 1226346031008.

The previous prime is 3899746081657. The next prime is 3899746081703. The reversal of 3899746081668 is 8661806479983.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3899746081668.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35728248 + ... + 35837231.

It is an arithmetic number, because the mean of its divisors is an integer number (200383344000).

Almost surely, 2^{3899746081668} is an apocalyptic number.

3899746081668 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3899746081668 is an abundant number, since it is smaller than the sum of its proper divisors (5718654430332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3899746081668 is a wasteful number, since it uses less digits than its factorization.

3899746081668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71565744 (or 71565742 counting only the distinct ones).

The product of its (nonzero) digits is 752467968, while the sum is 75.

The spelling of 3899746081668 in words is "three trillion, eight hundred ninety-nine billion, seven hundred forty-six million, eighty-one thousand, six hundred sixty-eight".