6626407081 has 4 divisors (see below), whose sum is σ = 7573036672. Its totient is φ = 5679777492.

The previous prime is 6626407069. The next prime is 6626407163. The reversal of 6626407081 is 1807046266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6626407081 is a prime.

It is a super-2 number, since 2×6626407081² = 87818541606253881122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6626407031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473314785 + ... + 473314798.

It is an arithmetic number, because the mean of its divisors is an integer number (1893259168).

Almost surely, 2^6626407081 is an apocalyptic number.

It is an amenable number.

6626407081 is a deficient number, since it is larger than the sum of its proper divisors (946629591).

6626407081 is an equidigital number, since it uses as much as digits as its factorization.

6626407081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946629590.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 6626407081 is about 81402.7461514659. The cubic root of 6626407081 is about 1878.2758336935.

The spelling of 6626407081 in words is "six billion, six hundred twenty-six million, four hundred seven thousand, eighty-one".