66004642555433 has 2 divisors, whose sum is σ = 66004642555434. Its totient is φ = 66004642555432.

The previous prime is 66004642555231. The next prime is 66004642555451. The reversal of 66004642555433 is 33455524640066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54608434621504 + 11396207933929 = 7389752^2 + 3375827^2 .

It is a cyclic number.

It is not a de Polignac number, because 66004642555433 - 2⁴⁰ = 64905130927657 is a prime.

It is a super-2 number, since 2×66004642555433² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66004642555493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33002321277716 + 33002321277717.

It is an arithmetic number, because the mean of its divisors is an integer number (33002321277717).

Almost surely, 2^{66004642555433} is an apocalyptic number.

It is an amenable number.

66004642555433 is a deficient number, since it is larger than the sum of its proper divisors (1).

66004642555433 is an equidigital number, since it uses as much as digits as its factorization.

66004642555433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104000, while the sum is 53.

The spelling of 66004642555433 in words is "sixty-six trillion, four billion, six hundred forty-two million, five hundred fifty-five thousand, four hundred thirty-three".