139266066 has 16 divisors (see below), whose sum is σ = 282690144. Its totient is φ = 45729024.

The previous prime is 139266031. The next prime is 139266073. The reversal of 139266066 is 660662931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172815 + ... + 173618.

It is an arithmetic number, because the mean of its divisors is an integer number (17668134).

Almost surely, 2^139266066 is an apocalyptic number.

139266066 is an abundant number, since it is smaller than the sum of its proper divisors (143424078).

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

139266066 is a wasteful number, since it uses less digits than its factorization.

139266066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346505.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 139266066 is about 11801.1044398395. The cubic root of 139266066 is about 518.3404513956.

The spelling of 139266066 in words is "one hundred thirty-nine million, two hundred sixty-six thousand, sixty-six".