66122507740 has 24 divisors (see below), whose sum is σ = 139584275712. Its totient is φ = 26310525120.

The previous prime is 66122507719. The next prime is 66122507741. The reversal of 66122507740 is 4770522166.

It is a junction number, because it is equal to n+sod(n) for n = 66122507693 and 66122507702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66122507741) 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, 8650959 + ... + 8658598.

It is an arithmetic number, because the mean of its divisors is an integer number (5816011488).

Almost surely, 2^66122507740 is an apocalyptic number.

It is an amenable number.

66122507740 is an abundant number, since it is smaller than the sum of its proper divisors (73461767972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66122507740 is a wasteful number, since it uses less digits than its factorization.

66122507740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17309757 (or 17309755 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 66122507740 in words is "sixty-six billion, one hundred twenty-two million, five hundred seven thousand, seven hundred forty".