66122507739 has 8 divisors (see below), whose sum is σ = 88373759040. Its totient is φ = 43976464136.

The previous prime is 66122507719. The next prime is 66122507741. The reversal of 66122507739 is 93770522166.

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 66122507739 - 2⁷ = 66122507611 is a prime.

It is a super-2 number, since 2×66122507739² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66122507719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26300457 + ... + 26302970.

It is an arithmetic number, because the mean of its divisors is an integer number (11046719880).

Almost surely, 2^66122507739 is an apocalyptic number.

66122507739 is a deficient number, since it is larger than the sum of its proper divisors (22251251301).

66122507739 is a wasteful number, since it uses less digits than its factorization.

66122507739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52603849.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 66122507739 in words is "sixty-six billion, one hundred twenty-two million, five hundred seven thousand, seven hundred thirty-nine".