66020526772770 has 16 divisors (see below), whose sum is σ = 158449264254720. Its totient is φ = 17605473806064.

The previous prime is 66020526772769. The next prime is 66020526772771. The reversal of 66020526772770 is 7727762502066.

It is an interprime number because it is at equal distance from previous prime (66020526772769) and next prime (66020526772771).

It is a self number, because there is not a number n which added to its sum of digits gives 66020526772770.

It is not an unprimeable number, because it can be changed into a prime (66020526772771) 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, 1100342112850 + ... + 1100342112909.

It is an arithmetic number, because the mean of its divisors is an integer number (9903079015920).

Almost surely, 2^{66020526772770} is an apocalyptic number.

66020526772770 is an abundant number, since it is smaller than the sum of its proper divisors (92428737481950).

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

66020526772770 is a wasteful number, since it uses less digits than its factorization.

66020526772770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200684225769.

The product of its (nonzero) digits is 20744640, while the sum is 57.

The spelling of 66020526772770 in words is "sixty-six trillion, twenty billion, five hundred twenty-six million, seven hundred seventy-two thousand, seven hundred seventy".