401766669 has 32 divisors (see below), whose sum is σ = 616343040. Its totient is φ = 258494976.

The previous prime is 401766653. The next prime is 401766689. The reversal of 401766669 is 966667104.

It is a happy number.

It is not a de Polignac number, because 401766669 - 2⁴ = 401766653 is a prime.

It is a super-2 number, since 2×401766669² = 322832912638711122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401766649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90469 + ... + 94805.

It is an arithmetic number, because the mean of its divisors is an integer number (19260720).

Almost surely, 2^401766669 is an apocalyptic number.

It is an amenable number.

401766669 is a deficient number, since it is larger than the sum of its proper divisors (214576371).

401766669 is a wasteful number, since it uses less digits than its factorization.

401766669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466 (or 4460 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 401766669 is about 20044.1180649087. The cubic root of 401766669 is about 737.8894506893.

The spelling of 401766669 in words is "four hundred one million, seven hundred sixty-six thousand, six hundred sixty-nine".