6642466451 has 2 divisors, whose sum is σ = 6642466452. Its totient is φ = 6642466450.

The previous prime is 6642466427. The next prime is 6642466459. The reversal of 6642466451 is 1546642466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6642466451 - 2¹⁸ = 6642204307 is a prime.

It is not a weakly prime, because it can be changed into another prime (6642466459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321233225 + 3321233226.

It is an arithmetic number, because the mean of its divisors is an integer number (3321233226).

Almost surely, 2^6642466451 is an apocalyptic number.

6642466451 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642466451 is an equidigital number, since it uses as much as digits as its factorization.

6642466451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 44.

The square root of 6642466451 is about 81501.3279094273. The cubic root of 6642466451 is about 1879.7919691157.

The spelling of 6642466451 in words is "six billion, six hundred forty-two million, four hundred sixty-six thousand, four hundred fifty-one".