401166677 has 2 divisors, whose sum is σ = 401166678. Its totient is φ = 401166676.

The previous prime is 401166653. The next prime is 401166679. The reversal of 401166677 is 776661104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385690321 + 15476356 = 19639^2 + 3934^2 .

It is a cyclic number.

It is not a de Polignac number, because 401166677 - 2¹⁸ = 400904533 is a prime.

Together with 401166679, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401166677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401166679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200583338 + 200583339.

It is an arithmetic number, because the mean of its divisors is an integer number (200583339).

Almost surely, 2^401166677 is an apocalyptic number.

It is an amenable number.

401166677 is a deficient number, since it is larger than the sum of its proper divisors (1).

401166677 is an equidigital number, since it uses as much as digits as its factorization.

401166677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 401166677 is about 20029.1456882215. The cubic root of 401166677 is about 737.5219502037.

The spelling of 401166677 in words is "four hundred one million, one hundred sixty-six thousand, six hundred seventy-seven".