66326756565766 has 48 divisors (see below), whose sum is σ = 109667745337680. Its totient is φ = 30050687845440.

The previous prime is 66326756565739. The next prime is 66326756565787. The reversal of 66326756565766 is 66756565762366.

It is a junction number, because it is equal to n+sod(n) for n = 66326756565692 and 66326756565701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19464945 + ... + 22617196.

It is an arithmetic number, because the mean of its divisors is an integer number (2284744694535).

Almost surely, 2^{66326756565766} is an apocalyptic number.

66326756565766 is a deficient number, since it is larger than the sum of its proper divisors (43340988771914).

66326756565766 is a wasteful number, since it uses less digits than its factorization.

66326756565766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42082277 (or 42082258 counting only the distinct ones).

The product of its digits is 10287648000, while the sum is 76.

The spelling of 66326756565766 in words is "sixty-six trillion, three hundred twenty-six billion, seven hundred fifty-six million, five hundred sixty-five thousand, seven hundred sixty-six".