38866666 has 16 divisors (see below), whose sum is σ = 61617600. Its totient is φ = 18335808.

The previous prime is 38866643. The next prime is 38866669. The reversal of 38866666 is 66666883.

38866666 is a modest number, since divided by 6666 gives 3886 as remainder.

It is not an unprimeable number, because it can be changed into a prime (38866669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8050 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (3851100).

Almost surely, 2^38866666 is an apocalyptic number.

38866666 is a deficient number, since it is larger than the sum of its proper divisors (22750934).

38866666 is a wasteful number, since it uses less digits than its factorization.

38866666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173.

The product of its digits is 1492992, while the sum is 49.

The square root of 38866666 is about 6234.3135949357. The cubic root of 38866666 is about 338.7342382703.

The spelling of 38866666 in words is "thirty-eight million, eight hundred sixty-six thousand, six hundred sixty-six".