66852577525866 has 32 divisors (see below), whose sum is σ = 149802335886528. Its totient is φ = 19710833667840.

The previous prime is 66852577525861. The next prime is 66852577525873.

It is a happy number.

66852577525866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66852577525791 and 66852577525800.

It is not an unprimeable number, because it can be changed into a prime (66852577525861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13688076495 + ... + 13688081378.

It is an arithmetic number, because the mean of its divisors is an integer number (4681322996454).

Almost surely, 2^{66852577525866} is an apocalyptic number.

66852577525866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66852577525866 is an abundant number, since it is smaller than the sum of its proper divisors (82949758360662).

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

66852577525866 is a wasteful number, since it uses less digits than its factorization.

66852577525866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27376157926.

The product of its digits is 10160640000, while the sum is 78.

The spelling of 66852577525866 in words is "sixty-six trillion, eight hundred fifty-two billion, five hundred seventy-seven million, five hundred twenty-five thousand, eight hundred sixty-six".