66522570780 has 48 divisors (see below), whose sum is σ = 192271693824. Its totient is φ = 17167114560.

The previous prime is 66522570773. The next prime is 66522570787. The reversal of 66522570780 is 8707522566.

It is an interprime number because it is at equal distance from previous prime (66522570773) and next prime (66522570787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522570787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17880552 + ... + 17884271.

It is an arithmetic number, because the mean of its divisors is an integer number (4005660288).

Almost surely, 2^66522570780 is an apocalyptic number.

66522570780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66522570780 is an abundant number, since it is smaller than the sum of its proper divisors (125749123044).

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

66522570780 is a wasteful number, since it uses less digits than its factorization.

66522570780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35764866 (or 35764864 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 66522570780 in words is "sixty-six billion, five hundred twenty-two million, five hundred seventy thousand, seven hundred eighty".