66252278361851 has 2 divisors, whose sum is σ = 66252278361852. Its totient is φ = 66252278361850.

The previous prime is 66252278361833. The next prime is 66252278361877. The reversal of 66252278361851 is 15816387225266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66252278361851 is a prime.

It is not a weakly prime, because it can be changed into another prime (66252278331851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33126139180925 + 33126139180926.

It is an arithmetic number, because the mean of its divisors is an integer number (33126139180926).

Almost surely, 2^{66252278361851} is an apocalyptic number.

66252278361851 is a deficient number, since it is larger than the sum of its proper divisors (1).

66252278361851 is an equidigital number, since it uses as much as digits as its factorization.

66252278361851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58060800, while the sum is 62.

The spelling of 66252278361851 in words is "sixty-six trillion, two hundred fifty-two billion, two hundred seventy-eight million, three hundred sixty-one thousand, eight hundred fifty-one".