66882354421 has 2 divisors, whose sum is σ = 66882354422. Its totient is φ = 66882354420.

The previous prime is 66882354337. The next prime is 66882354449. The reversal of 66882354421 is 12445328866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58280719396 + 8601635025 = 241414^2 + 92745^2 .

It is a cyclic number.

It is not a de Polignac number, because 66882354421 - 2⁷ = 66882354293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66882354821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33441177210 + 33441177211.

It is an arithmetic number, because the mean of its divisors is an integer number (33441177211).

Almost surely, 2^66882354421 is an apocalyptic number.

It is an amenable number.

66882354421 is a deficient number, since it is larger than the sum of its proper divisors (1).

66882354421 is an equidigital number, since it uses as much as digits as its factorization.

66882354421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 49.

The spelling of 66882354421 in words is "sixty-six billion, eight hundred eighty-two million, three hundred fifty-four thousand, four hundred twenty-one".