66392725499 has 6 divisors (see below), whose sum is σ = 66767101380. Its totient is φ = 66018388316.

The previous prime is 66392725493. The next prime is 66392725517. The reversal of 66392725499 is 99452729366.

It is a de Polignac number, because none of the positive numbers 2^k-66392725499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66392725493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3437732 + ... + 3456990.

It is an arithmetic number, because the mean of its divisors is an integer number (11127850230).

Almost surely, 2^66392725499 is an apocalyptic number.

66392725499 is a deficient number, since it is larger than the sum of its proper divisors (374375881).

66392725499 is an frugal number, since it uses more digits than its factorization.

66392725499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38697 (or 19438 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 62.

The spelling of 66392725499 in words is "sixty-six billion, three hundred ninety-two million, seven hundred twenty-five thousand, four hundred ninety-nine".