3858591666 has 32 divisors (see below), whose sum is σ = 7768627776. Its totient is φ = 1277640000.

The previous prime is 3858591629. The next prime is 3858591673. The reversal of 3858591666 is 6661958583.

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, 1411521 + ... + 1414251.

It is an arithmetic number, because the mean of its divisors is an integer number (242769618).

Almost surely, 2^3858591666 is an apocalyptic number.

3858591666 is an abundant number, since it is smaller than the sum of its proper divisors (3910036110).

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

3858591666 is a wasteful number, since it uses less digits than its factorization.

3858591666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218.

The product of its digits is 9331200, while the sum is 57.

The square root of 3858591666 is about 62117.5632651507. The cubic root of 3858591666 is about 1568.4702079785.

The spelling of 3858591666 in words is "three billion, eight hundred fifty-eight million, five hundred ninety-one thousand, six hundred sixty-six".