76660139 has 2 divisors, whose sum is σ = 76660140. Its totient is φ = 76660138.

The previous prime is 76660109. The next prime is 76660153. The reversal of 76660139 is 93106667.

It is a strong prime.

It is an emirp because it is prime and its reverse (93106667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76660139 - 2¹⁶ = 76594603 is a prime.

It is a super-2 number, since 2×76660139² = 11753553822998642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76660109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38330069 + 38330070.

It is an arithmetic number, because the mean of its divisors is an integer number (38330070).

Almost surely, 2^76660139 is an apocalyptic number.

76660139 is a deficient number, since it is larger than the sum of its proper divisors (1).

76660139 is an equidigital number, since it uses as much as digits as its factorization.

76660139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 76660139 is about 8755.5775937399. The cubic root of 76660139 is about 424.8052422531.

The spelling of 76660139 in words is "seventy-six million, six hundred sixty thousand, one hundred thirty-nine".