66407470439 has 2 divisors, whose sum is σ = 66407470440. Its totient is φ = 66407470438.

The previous prime is 66407470427. The next prime is 66407470489. The reversal of 66407470439 is 93407470466.

It is an a-pointer prime, because the next prime (66407470489) can be obtained adding 66407470439 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66407470439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66407470489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33203735219 + 33203735220.

It is an arithmetic number, because the mean of its divisors is an integer number (33203735220).

Almost surely, 2^66407470439 is an apocalyptic number.

66407470439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66407470439 is an equidigital number, since it uses as much as digits as its factorization.

66407470439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 66407470439 in words is "sixty-six billion, four hundred seven million, four hundred seventy thousand, four hundred thirty-nine".