401226663 has 4 divisors (see below), whose sum is σ = 534968888. Its totient is φ = 267484440.

The previous prime is 401226649. The next prime is 401226671. The reversal of 401226663 is 366622104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401226663 - 2¹³ = 401218471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401226663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401221663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66871108 + ... + 66871113.

It is an arithmetic number, because the mean of its divisors is an integer number (133742222).

Almost surely, 2^401226663 is an apocalyptic number.

401226663 is a deficient number, since it is larger than the sum of its proper divisors (133742225).

401226663 is a wasteful number, since it uses less digits than its factorization.

401226663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133742224.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 401226663 is about 20030.6431000105. The cubic root of 401226663 is about 737.5587086463.

Adding to 401226663 its reverse (366622104), we get a palindrome (767848767).

The spelling of 401226663 in words is "four hundred one million, two hundred twenty-six thousand, six hundred sixty-three".