401166533 has 2 divisors, whose sum is σ = 401166534. Its totient is φ = 401166532.

The previous prime is 401166511. The next prime is 401166539. The reversal of 401166533 is 335661104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354079489 + 47087044 = 18817^2 + 6862^2 .

It is a cyclic number.

It is not a de Polignac number, because 401166533 - 2¹⁰ = 401165509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401166496 and 401166505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401166539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200583266 + 200583267.

It is an arithmetic number, because the mean of its divisors is an integer number (200583267).

Almost surely, 2^401166533 is an apocalyptic number.

It is an amenable number.

401166533 is a deficient number, since it is larger than the sum of its proper divisors (1).

401166533 is an equidigital number, since it uses as much as digits as its factorization.

401166533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 401166533 is about 20029.1420934597. The cubic root of 401166533 is about 737.5218619585.

The spelling of 401166533 in words is "four hundred one million, one hundred sixty-six thousand, five hundred thirty-three".