138066767 has 8 divisors (see below), whose sum is σ = 142998240. Its totient is φ = 133146720.

The previous prime is 138066757. The next prime is 138066779. The reversal of 138066767 is 767660831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138066767 - 2²² = 133872463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138066727) 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, 27278 + ... + 31940.

It is an arithmetic number, because the mean of its divisors is an integer number (17874780).

Almost surely, 2^138066767 is an apocalyptic number.

138066767 is a deficient number, since it is larger than the sum of its proper divisors (4931473).

138066767 is a wasteful number, since it uses less digits than its factorization.

138066767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5713.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 138066767 is about 11750.1815730652. The cubic root of 138066767 is about 516.8482520018.

The spelling of 138066767 in words is "one hundred thirty-eight million, sixty-six thousand, seven hundred sixty-seven".