66374402407 has 2 divisors, whose sum is σ = 66374402408. Its totient is φ = 66374402406.

The previous prime is 66374402371. The next prime is 66374402417. The reversal of 66374402407 is 70420447366.

66374402407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66374402407 - 2²³ = 66366013799 is a prime.

It is a super-2 number, since 2×66374402407² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66374402417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33187201203 + 33187201204.

It is an arithmetic number, because the mean of its divisors is an integer number (33187201204).

Almost surely, 2^66374402407 is an apocalyptic number.

66374402407 is a deficient number, since it is larger than the sum of its proper divisors (1).

66374402407 is an equidigital number, since it uses as much as digits as its factorization.

66374402407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 43.

It can be divided in two parts, 6637 and 4402407, that added together give a palindrome (4409044).

The spelling of 66374402407 in words is "sixty-six billion, three hundred seventy-four million, four hundred two thousand, four hundred seven".