3999524661 has 32 divisors (see below), whose sum is σ = 6530563200. Its totient is φ = 2398947840.

The previous prime is 3999524653. The next prime is 3999524663. The reversal of 3999524661 is 1664259993.

3999524661 is a `hidden beast` number, since 3 + 99 + 95 + 2 + 466 + 1 = 666.

It is not a de Polignac number, because 3999524661 - 2³ = 3999524653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3999524598 and 3999524607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999524663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40606 + ... + 98223.

It is an arithmetic number, because the mean of its divisors is an integer number (204080100).

Almost surely, 2^3999524661 is an apocalyptic number.

It is an amenable number.

3999524661 is a deficient number, since it is larger than the sum of its proper divisors (2531038539).

3999524661 is a wasteful number, since it uses less digits than its factorization.

3999524661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138946 (or 138940 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 3999524661 is about 63241.7952069674. The cubic root of 3999524661 is about 1587.3381700082.

The spelling of 3999524661 in words is "three billion, nine hundred ninety-nine million, five hundred twenty-four thousand, six hundred sixty-one".