138895066 has 16 divisors (see below), whose sum is σ = 227715840. Its totient is φ = 63253440.

The previous prime is 138895063. The next prime is 138895067. The reversal of 138895066 is 660598831.

It is not an unprimeable number, because it can be changed into a prime (138895063) 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, 64836 + ... + 66943.

It is an arithmetic number, because the mean of its divisors is an integer number (14232240).

Almost surely, 2^138895066 is an apocalyptic number.

138895066 is a deficient number, since it is larger than the sum of its proper divisors (88820774).

138895066 is a wasteful number, since it uses less digits than its factorization.

138895066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131829.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 138895066 is about 11785.3750894912. The cubic root of 138895066 is about 517.8797617000.

The spelling of 138895066 in words is "one hundred thirty-eight million, eight hundred ninety-five thousand, sixty-six".