66673393651 has 2 divisors, whose sum is σ = 66673393652. Its totient is φ = 66673393650.

The previous prime is 66673393637. The next prime is 66673393751. The reversal of 66673393651 is 15639337666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66673393651 - 2⁹ = 66673393139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66673393592 and 66673393601.

It is not a weakly prime, because it can be changed into another prime (66673393351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336696825 + 33336696826.

It is an arithmetic number, because the mean of its divisors is an integer number (33336696826).

Almost surely, 2^66673393651 is an apocalyptic number.

66673393651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66673393651 is an equidigital number, since it uses as much as digits as its factorization.

66673393651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 55.

It can be divided in two parts, 666733 and 93651, that added together give a square (760384 = 872²).

The spelling of 66673393651 in words is "sixty-six billion, six hundred seventy-three million, three hundred ninety-three thousand, six hundred fifty-one".