66374099927 has 2 divisors, whose sum is σ = 66374099928. Its totient is φ = 66374099926.

The previous prime is 66374099881. The next prime is 66374099929. The reversal of 66374099927 is 72999047366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66374099927 is a prime.

It is a super-2 number, since 2×66374099927² (a number of 22 digits) contains 22 as substring.

Together with 66374099929, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66374099927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66374099929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33187049963 + 33187049964.

It is an arithmetic number, because the mean of its divisors is an integer number (33187049964).

Almost surely, 2^66374099927 is an apocalyptic number.

66374099927 is a deficient number, since it is larger than the sum of its proper divisors (1).

66374099927 is an equidigital number, since it uses as much as digits as its factorization.

66374099927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30862944, while the sum is 62.

The spelling of 66374099927 in words is "sixty-six billion, three hundred seventy-four million, ninety-nine thousand, nine hundred twenty-seven".