3900505666907 has 12 divisors (see below), whose sum is σ = 4097226183120. Its totient is φ = 3706209896400.

The previous prime is 3900505666901. The next prime is 3900505666913. The reversal of 3900505666907 is 7096665050093.

It is an interprime number because it is at equal distance from previous prime (3900505666901) and next prime (3900505666913).

It is not a de Polignac number, because 3900505666907 - 2⁴ = 3900505666891 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900505666901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3194432 + ... + 4243277.

It is an arithmetic number, because the mean of its divisors is an integer number (341435515260).

Almost surely, 2^{3900505666907} is an apocalyptic number.

3900505666907 is a deficient number, since it is larger than the sum of its proper divisors (196720516213).

3900505666907 is an equidigital number, since it uses as much as digits as its factorization.

3900505666907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7438034 (or 7437883 counting only the distinct ones).

The product of its (nonzero) digits is 9185400, while the sum is 56.

The spelling of 3900505666907 in words is "three trillion, nine hundred billion, five hundred five million, six hundred sixty-six thousand, nine hundred seven".