6419746661 has 2 divisors, whose sum is σ = 6419746662. Its totient is φ = 6419746660.

The previous prime is 6419746651. The next prime is 6419746681. The reversal of 6419746661 is 1666479146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6397600225 + 22146436 = 79985^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 6419746661 - 2¹⁴ = 6419730277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6419746651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209873330 + 3209873331.

It is an arithmetic number, because the mean of its divisors is an integer number (3209873331).

Almost surely, 2^6419746661 is an apocalyptic number.

It is an amenable number.

6419746661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6419746661 is an equidigital number, since it uses as much as digits as its factorization.

6419746661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 6419746661 is about 80123.3215799245. The cubic root of 6419746661 is about 1858.5430704649.

The spelling of 6419746661 in words is "six billion, four hundred nineteen million, seven hundred forty-six thousand, six hundred sixty-one".