121766540067 has 48 divisors (see below), whose sum is σ = 187186839840. Its totient is φ = 76011457536.

The previous prime is 121766540059. The next prime is 121766540069. The reversal of 121766540067 is 760045667121.

121766540067 is a `hidden beast` number, since 12 + 176 + 6 + 5 + 400 + 67 = 666.

It is not a de Polignac number, because 121766540067 - 2³ = 121766540059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121766540069) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28791109 + ... + 28795337.

It is an arithmetic number, because the mean of its divisors is an integer number (3899725830).

Almost surely, 2^121766540067 is an apocalyptic number.

121766540067 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121766540067 is a deficient number, since it is larger than the sum of its proper divisors (65420299773).

121766540067 is a wasteful number, since it uses less digits than its factorization.

121766540067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172 (or 5169 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 121766540067 in words is "one hundred twenty-one billion, seven hundred sixty-six million, five hundred forty thousand, sixty-seven".