38666666 has 8 divisors (see below), whose sum is σ = 58125600. Its totient is φ = 19291468.

The previous prime is 38666647. The next prime is 38666669. The reversal of 38666666 is 66666683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×38666666² = 2990222119111112, which contains 22 as substring.

38666666 is a modest number, since divided by 6666 gives 3866 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 38666666.

It is not an unprimeable number, because it can be changed into a prime (38666669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19766 + ... + 21633.

It is an arithmetic number, because the mean of its divisors is an integer number (7265700).

Almost surely, 2^38666666 is an apocalyptic number.

38666666 is a deficient number, since it is larger than the sum of its proper divisors (19458934).

38666666 is a wasteful number, since it uses less digits than its factorization.

38666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41868.

The product of its digits is 1119744, while the sum is 47.

The square root of 38666666 is about 6218.2526484536. The cubic root of 38666666 is about 338.1522195222.

The spelling of 38666666 in words is "thirty-eight million, six hundred sixty-six thousand, six hundred sixty-six".