66344265435025 has 12 divisors (see below), whose sum is σ = 82354314130524. Its totient is φ = 53019009128000.

The previous prime is 66344265434999. The next prime is 66344265435079. The reversal of 66344265435025 is 52053456244366.

It can be written as a sum of positive squares in 6 ways, for example, as 123715399824 + 66220550035201 = 351732^2 + 8137601^2 .

It is a de Polignac number, because none of the positive numbers 2^k-66344265435025 is a prime.

It is a super-2 number, since 2×66344265435025² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410056506 + ... + 1410103555.

It is an arithmetic number, because the mean of its divisors is an integer number (6862859510877).

Almost surely, 2^{66344265435025} is an apocalyptic number.

It is an amenable number.

66344265435025 is a deficient number, since it is larger than the sum of its proper divisors (16010048695499).

66344265435025 is a wasteful number, since it uses less digits than its factorization.

66344265435025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820161012 (or 2820161007 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 55.

The spelling of 66344265435025 in words is "sixty-six trillion, three hundred forty-four billion, two hundred sixty-five million, four hundred thirty-five thousand, twenty-five".