3911642667 has 6 divisors (see below), whose sum is σ = 5650150532. Its totient is φ = 2607761772.

The previous prime is 3911642617. The next prime is 3911642671. The reversal of 3911642667 is 7662461193.

It is not a de Polignac number, because 3911642667 - 2¹⁸ = 3911380523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3911642617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217313473 + ... + 217313490.

Almost surely, 2^3911642667 is an apocalyptic number.

3911642667 is a deficient number, since it is larger than the sum of its proper divisors (1738507865).

3911642667 is a wasteful number, since it uses less digits than its factorization.

3911642667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434626969 (or 434626966 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 3911642667 is about 62543.1264568697. The cubic root of 3911642667 is about 1575.6257081538.

The spelling of 3911642667 in words is "three billion, nine hundred eleven million, six hundred forty-two thousand, six hundred sixty-seven".