138176766 has 180 divisors, whose sum is σ = 393791112. Its totient is φ = 36088416.

The previous prime is 138176743. The next prime is 138176771. The reversal of 138176766 is 667671831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 1341471 + ... + 1341573.

Almost surely, 2^138176766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138176766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196895556).

138176766 is an abundant number, since it is smaller than the sum of its proper divisors (255614346).

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

138176766 is a wasteful number, since it uses less digits than its factorization.

138176766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 128 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 138176766 is about 11754.8613773196. The cubic root of 138176766 is about 516.9854747393.

The spelling of 138176766 in words is "one hundred thirty-eight million, one hundred seventy-six thousand, seven hundred sixty-six".