41664363421 has 2 divisors, whose sum is σ = 41664363422. Its totient is φ = 41664363420.

The previous prime is 41664363401. The next prime is 41664363437. The reversal of 41664363421 is 12436346614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41646605625 + 17757796 = 204075^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 41664363421 - 2²⁷ = 41530145693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41664363401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20832181710 + 20832181711.

It is an arithmetic number, because the mean of its divisors is an integer number (20832181711).

Almost surely, 2^41664363421 is an apocalyptic number.

It is an amenable number.

41664363421 is a deficient number, since it is larger than the sum of its proper divisors (1).

41664363421 is an equidigital number, since it uses as much as digits as its factorization.

41664363421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 40.

The spelling of 41664363421 in words is "forty-one billion, six hundred sixty-four million, three hundred sixty-three thousand, four hundred twenty-one".