66098951623 has 2 divisors, whose sum is σ = 66098951624. Its totient is φ = 66098951622.

The previous prime is 66098951621. The next prime is 66098951651. The reversal of 66098951623 is 32615989066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66098951623 - 2¹ = 66098951621 is a prime.

Together with 66098951621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66098951621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33049475811 + 33049475812.

It is an arithmetic number, because the mean of its divisors is an integer number (33049475812).

Almost surely, 2^66098951623 is an apocalyptic number.

66098951623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66098951623 is an equidigital number, since it uses as much as digits as its factorization.

66098951623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 66098951623 in words is "sixty-six billion, ninety-eight million, nine hundred fifty-one thousand, six hundred twenty-three".