66726733331 has 8 divisors (see below), whose sum is σ = 70057920720. Its totient is φ = 63464230368.

The previous prime is 66726733319. The next prime is 66726733343. The reversal of 66726733331 is 13333762766.

It is an interprime number because it is at equal distance from previous prime (66726733319) and next prime (66726733343).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66726733331 - 2²² = 66722539027 is a prime.

It is a super-2 number, since 2×66726733331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66726733351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17169116 + ... + 17173001.

It is an arithmetic number, because the mean of its divisors is an integer number (8757240090).

Almost surely, 2^66726733331 is an apocalyptic number.

66726733331 is a deficient number, since it is larger than the sum of its proper divisors (3331187389).

66726733331 is a wasteful number, since it uses less digits than its factorization.

66726733331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34342213.

The product of its digits is 1714608, while the sum is 47.

The spelling of 66726733331 in words is "sixty-six billion, seven hundred twenty-six million, seven hundred thirty-three thousand, three hundred thirty-one".