401071866 has 16 divisors (see below), whose sum is σ = 863847264. Its totient is φ = 123406704.

The previous prime is 401071807. The next prime is 401071903. The reversal of 401071866 is 668170104.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2570896 + ... + 2571051.

It is an arithmetic number, because the mean of its divisors is an integer number (53990454).

Almost surely, 2^401071866 is an apocalyptic number.

401071866 is an abundant number, since it is smaller than the sum of its proper divisors (462775398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401071866 is a wasteful number, since it uses less digits than its factorization.

401071866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141965.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 401071866 is about 20026.7787225005. The cubic root of 401071866 is about 737.4638440955.

The spelling of 401071866 in words is "four hundred one million, seventy-one thousand, eight hundred sixty-six".