23685666 has 16 divisors (see below), whose sum is σ = 49864800. Its totient is φ = 7479648.

The previous prime is 23685637. The next prime is 23685677. The reversal of 23685666 is 66658632.

It is a super-2 number, since 2×23685666² = 1122021547727112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103771 + ... + 103998.

It is an arithmetic number, because the mean of its divisors is an integer number (3116550).

Almost surely, 2^23685666 is an apocalyptic number.

23685666 is an abundant number, since it is smaller than the sum of its proper divisors (26179134).

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

23685666 is a wasteful number, since it uses less digits than its factorization.

23685666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207793.

The product of its digits is 311040, while the sum is 42.

The square root of 23685666 is about 4866.7921673316. The cubic root of 23685666 is about 287.1850757033.

The spelling of 23685666 in words is "twenty-three million, six hundred eighty-five thousand, six hundred sixty-six".