7985426663 has 2 divisors, whose sum is σ = 7985426664. Its totient is φ = 7985426662.

The previous prime is 7985426629. The next prime is 7985426681. The reversal of 7985426663 is 3666245897.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3666245897) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7985426663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7985426599 and 7985426608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985426693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992713331 + 3992713332.

It is an arithmetic number, because the mean of its divisors is an integer number (3992713332).

Almost surely, 2^7985426663 is an apocalyptic number.

7985426663 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985426663 is an equidigital number, since it uses as much as digits as its factorization.

7985426663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 56.

The square root of 7985426663 is about 89361.2145340472. The cubic root of 7985426663 is about 1998.7848170648.

The spelling of 7985426663 in words is "seven billion, nine hundred eighty-five million, four hundred twenty-six thousand, six hundred sixty-three".