18770666479 has 2 divisors, whose sum is σ = 18770666480. Its totient is φ = 18770666478.

The previous prime is 18770666449. The next prime is 18770666513. The reversal of 18770666479 is 97466607781.

It is a weak prime.

It is an emirp because it is prime and its reverse (97466607781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18770666479 - 2¹¹ = 18770664431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18770666449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9385333239 + 9385333240.

It is an arithmetic number, because the mean of its divisors is an integer number (9385333240).

Almost surely, 2^18770666479 is an apocalyptic number.

18770666479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18770666479 is an equidigital number, since it uses as much as digits as its factorization.

18770666479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 18770666479 in words is "eighteen billion, seven hundred seventy million, six hundred sixty-six thousand, four hundred seventy-nine".