66265427883257 has 16 divisors (see below), whose sum is σ = 68690601767424. Its totient is φ = 63858697056000.

The previous prime is 66265427883247. The next prime is 66265427883331. The reversal of 66265427883257 is 75238872456266.

It is a cyclic number.

It is not a de Polignac number, because 66265427883257 - 2⁴⁰ = 65165916255481 is a prime.

It is a super-2 number, since 2×66265427883257² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66265427883217) 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, 4561907 + ... + 12383127.

It is an arithmetic number, because the mean of its divisors is an integer number (4293162610464).

Almost surely, 2^{66265427883257} is an apocalyptic number.

It is an amenable number.

66265427883257 is a deficient number, since it is larger than the sum of its proper divisors (2425173884167).

66265427883257 is a wasteful number, since it uses less digits than its factorization.

66265427883257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822400.

The product of its digits is 1625702400, while the sum is 71.

The spelling of 66265427883257 in words is "sixty-six trillion, two hundred sixty-five billion, four hundred twenty-seven million, eight hundred eighty-three thousand, two hundred fifty-seven".