6466149149 has 2 divisors, whose sum is σ = 6466149150. Its totient is φ = 6466149148.

The previous prime is 6466149139. The next prime is 6466149181. The reversal of 6466149149 is 9419416646.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4603622500 + 1862526649 = 67850^2 + 43157^2 .

It is a cyclic number.

It is not a de Polignac number, because 6466149149 - 2²⁰ = 6465100573 is a prime.

It is a super-2 number, since 2×6466149149² = 83622169634226848402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6466149097 and 6466149106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466149139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233074574 + 3233074575.

It is an arithmetic number, because the mean of its divisors is an integer number (3233074575).

Almost surely, 2^6466149149 is an apocalyptic number.

It is an amenable number.

6466149149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466149149 is an equidigital number, since it uses as much as digits as its factorization.

6466149149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 6466149149 is about 80412.3693781000. The cubic root of 6466149149 is about 1863.0102284167.

The spelling of 6466149149 in words is "six billion, four hundred sixty-six million, one hundred forty-nine thousand, one hundred forty-nine".