6406662373 has 2 divisors, whose sum is σ = 6406662374. Its totient is φ = 6406662372.

The previous prime is 6406662359. The next prime is 6406662391. The reversal of 6406662373 is 3732666046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3274357284 + 3132305089 = 57222^2 + 55967^2 .

It is a cyclic number.

It is not a de Polignac number, because 6406662373 - 2²⁹ = 5869791461 is a prime.

It is a super-2 number, since 2×6406662373² = 82090645523227982258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6406662973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203331186 + 3203331187.

It is an arithmetic number, because the mean of its divisors is an integer number (3203331187).

Almost surely, 2^6406662373 is an apocalyptic number.

It is an amenable number.

6406662373 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406662373 is an equidigital number, since it uses as much as digits as its factorization.

6406662373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 43.

The square root of 6406662373 is about 80041.6290001647. The cubic root of 6406662373 is about 1857.2795599397.

The spelling of 6406662373 in words is "six billion, four hundred six million, six hundred sixty-two thousand, three hundred seventy-three".