138366966 has 16 divisors (see below), whose sum is σ = 282622464. Its totient is φ = 45140904.

The previous prime is 138366959. The next prime is 138366967. The reversal of 138366966 is 669663831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138366967) 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, 245050 + ... + 245613.

It is an arithmetic number, because the mean of its divisors is an integer number (17663904).

Almost surely, 2^138366966 is an apocalyptic number.

138366966 is an abundant number, since it is smaller than the sum of its proper divisors (144255498).

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

138366966 is a wasteful number, since it uses less digits than its factorization.

138366966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490715.

The product of its digits is 839808, while the sum is 48.

The square root of 138366966 is about 11762.9488649743. The cubic root of 138366966 is about 517.2225757544. Note that the first 3 decimals are identical.

It can be divided in two parts, 13836 and 6966, that added together give a palindrome (20802).

The spelling of 138366966 in words is "one hundred thirty-eight million, three hundred sixty-six thousand, nine hundred sixty-six".