66450004554293 has 2 divisors, whose sum is σ = 66450004554294. Its totient is φ = 66450004554292.

The previous prime is 66450004554211. The next prime is 66450004554299. The reversal of 66450004554293 is 39245540005466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48770990206129 + 17679014348164 = 6983623^2 + 4204642^2 .

It is a cyclic number.

It is not a de Polignac number, because 66450004554293 - 2¹⁸ = 66450004292149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66450004554299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33225002277146 + 33225002277147.

It is an arithmetic number, because the mean of its divisors is an integer number (33225002277147).

Almost surely, 2^{66450004554293} is an apocalyptic number.

It is an amenable number.

66450004554293 is a deficient number, since it is larger than the sum of its proper divisors (1).

66450004554293 is an equidigital number, since it uses as much as digits as its factorization.

66450004554293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552000, while the sum is 53.

The spelling of 66450004554293 in words is "sixty-six trillion, four hundred fifty billion, four million, five hundred fifty-four thousand, two hundred ninety-three".