109666477 has 2 divisors, whose sum is σ = 109666478. Its totient is φ = 109666476.

The previous prime is 109666451. The next prime is 109666481. The reversal of 109666477 is 774666901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108555561 + 1110916 = 10419^2 + 1054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109666477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109666177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54833238 + 54833239.

It is an arithmetic number, because the mean of its divisors is an integer number (54833239).

Almost surely, 2^109666477 is an apocalyptic number.

It is an amenable number.

109666477 is a deficient number, since it is larger than the sum of its proper divisors (1).

109666477 is an equidigital number, since it uses as much as digits as its factorization.

109666477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 109666477 is about 10472.1763258646. The cubic root of 109666477 is about 478.6572382638.

The spelling of 109666477 in words is "one hundred nine million, six hundred sixty-six thousand, four hundred seventy-seven".