402066111 has 4 divisors (see below), whose sum is σ = 536088152. Its totient is φ = 268044072.

The previous prime is 402066083. The next prime is 402066143. The reversal of 402066111 is 111660204.

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

It is not a de Polignac number, because 402066111 - 2¹⁰ = 402065087 is a prime.

It is a super-2 number, since 2×402066111² = 323314315229328642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402066191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67011016 + ... + 67011021.

It is an arithmetic number, because the mean of its divisors is an integer number (134022038).

Almost surely, 2^402066111 is an apocalyptic number.

402066111 is a deficient number, since it is larger than the sum of its proper divisors (134022041).

402066111 is a wasteful number, since it uses less digits than its factorization.

402066111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134022040.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 402066111 is about 20051.5862464794. The cubic root of 402066111 is about 738.0727247462.

The spelling of 402066111 in words is "four hundred two million, sixty-six thousand, one hundred eleven".