3807869661 has 12 divisors (see below), whose sum is σ = 5823800892. Its totient is φ = 2389251456.

The previous prime is 3807869603. The next prime is 3807869677. The reversal of 3807869661 is 1669687083.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1211457636 + 2596412025 = 34806^2 + 50955^2 .

It is not a de Polignac number, because 3807869661 - 2¹⁰ = 3807868637 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3807869598 and 3807869607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3807869861) 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, 12443866 + ... + 12444171.

It is an arithmetic number, because the mean of its divisors is an integer number (485316741).

Almost surely, 2^3807869661 is an apocalyptic number.

It is an amenable number.

3807869661 is a deficient number, since it is larger than the sum of its proper divisors (2015931231).

3807869661 is a wasteful number, since it uses less digits than its factorization.

3807869661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24888060 (or 24888057 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 3807869661 is about 61707.9383953151. The cubic root of 3807869661 is about 1561.5672476755.

The spelling of 3807869661 in words is "three billion, eight hundred seven million, eight hundred sixty-nine thousand, six hundred sixty-one".