166677755479 has 2 divisors, whose sum is σ = 166677755480. Its totient is φ = 166677755478.

The previous prime is 166677755407. The next prime is 166677755509. The reversal of 166677755479 is 974557776661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166677755479 - 2¹³ = 166677747287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166677755779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83338877739 + 83338877740.

It is an arithmetic number, because the mean of its divisors is an integer number (83338877740).

Almost surely, 2^166677755479 is an apocalyptic number.

166677755479 is a deficient number, since it is larger than the sum of its proper divisors (1).

166677755479 is an equidigital number, since it uses as much as digits as its factorization.

166677755479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466754400, while the sum is 70.

The spelling of 166677755479 in words is "one hundred sixty-six billion, six hundred seventy-seven million, seven hundred fifty-five thousand, four hundred seventy-nine".