6662291213 has 2 divisors, whose sum is σ = 6662291214. Its totient is φ = 6662291212.

The previous prime is 6662291203. The next prime is 6662291221. The reversal of 6662291213 is 3121922666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5984105449 + 678185764 = 77357^2 + 26042^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662291213 - 2⁴ = 6662291197 is a prime.

It is a super-2 number, since 2×6662291213² = 88772248413634022738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662291203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331145606 + 3331145607.

It is an arithmetic number, because the mean of its divisors is an integer number (3331145607).

Almost surely, 2^6662291213 is an apocalyptic number.

It is an amenable number.

6662291213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662291213 is an equidigital number, since it uses as much as digits as its factorization.

6662291213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 6662291213 is about 81622.8596227797. The cubic root of 6662291213 is about 1881.6602216961.

The spelling of 6662291213 in words is "six billion, six hundred sixty-two million, two hundred ninety-one thousand, two hundred thirteen".