401566011 has 16 divisors (see below), whose sum is σ = 667538688. Its totient is φ = 208605600.

The previous prime is 401565991. The next prime is 401566019. The reversal of 401566011 is 110665104.

It is not a de Polignac number, because 401566011 - 2⁷ = 401565883 is a prime.

It is a super-2 number, since 2×401566011² = 322510522380904242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401566019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868960 + ... + 869421.

It is an arithmetic number, because the mean of its divisors is an integer number (41721168).

Almost surely, 2^401566011 is an apocalyptic number.

401566011 is a deficient number, since it is larger than the sum of its proper divisors (265972677).

401566011 is a wasteful number, since it uses less digits than its factorization.

401566011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738402.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 401566011 is about 20039.1120312253. The cubic root of 401566011 is about 737.7665866082.

The spelling of 401566011 in words is "four hundred one million, five hundred sixty-six thousand, eleven".