66075881480766 has 32 divisors (see below), whose sum is σ = 146835559653120. Its totient is φ = 22025253705912.

The previous prime is 66075881480759. The next prime is 66075881480773. The reversal of 66075881480766 is 66708418857066.

66075881480766 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 5 + 8 + 81 + 480 + 7 + 66 = 666.

It is an interprime number because it is at equal distance from previous prime (66075881480759) and next prime (66075881480773).

It is a super-2 number, since 2×66075881480766² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66075881480694 and 66075881480703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52227021 + ... + 53477223.

It is an arithmetic number, because the mean of its divisors is an integer number (4588611239160).

Almost surely, 2^{66075881480766} is an apocalyptic number.

66075881480766 is an abundant number, since it is smaller than the sum of its proper divisors (80759678172354).

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

66075881480766 is a wasteful number, since it uses less digits than its factorization.

66075881480766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228957 (or 2228951 counting only the distinct ones).

The product of its (nonzero) digits is 650280960, while the sum is 72.

The spelling of 66075881480766 in words is "sixty-six trillion, seventy-five billion, eight hundred eighty-one million, four hundred eighty thousand, seven hundred sixty-six".