66122786730 has 768 divisors, whose sum is σ = 238850519040. Its totient is φ = 11280384000.

The previous prime is 66122786729. The next prime is 66122786731. The reversal of 66122786730 is 3768722166.

It is an interprime number because it is at equal distance from previous prime (66122786729) and next prime (66122786731).

It is a self number, because there is not a number n which added to its sum of digits gives 66122786730.

It is not an unprimeable number, because it can be changed into a prime (66122786731) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 164894530 + ... + 164894930.

It is an arithmetic number, because the mean of its divisors is an integer number (311003280).

Almost surely, 2^66122786730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66122786730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119425259520).

66122786730 is an abundant number, since it is smaller than the sum of its proper divisors (172727732310).

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

66122786730 is a wasteful number, since it uses less digits than its factorization.

66122786730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 66122786730 in words is "sixty-six billion, one hundred twenty-two million, seven hundred eighty-six thousand, seven hundred thirty".