3666891705 has 16 divisors (see below), whose sum is σ = 5872634304. Its totient is φ = 1953806400.

The previous prime is 3666891671. The next prime is 3666891707. The reversal of 3666891705 is 5071986663.

3666891705 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3666891705 - 2⁷ = 3666891577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3666891707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100534 + ... + 132063.

It is an arithmetic number, because the mean of its divisors is an integer number (367039644).

Almost surely, 2^3666891705 is an apocalyptic number.

It is an amenable number.

3666891705 is a deficient number, since it is larger than the sum of its proper divisors (2205742599).

3666891705 is a wasteful number, since it uses less digits than its factorization.

3666891705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233656.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 3666891705 is about 60554.8652463202. The cubic root of 3666891705 is about 1542.0532158083.

The spelling of 3666891705 in words is "three billion, six hundred sixty-six million, eight hundred ninety-one thousand, seven hundred five".