4066406401 has 4 divisors (see below), whose sum is σ = 4082229252. Its totient is φ = 4050583552.

The previous prime is 4066406387. The next prime is 4066406453. The reversal of 4066406401 is 1046046604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3896755776 + 169650625 = 62424^2 + 13025^2 .

It is a cyclic number.

It is not a de Polignac number, because 4066406401 - 2¹³ = 4066398209 is a prime.

It is a super-2 number, since 2×4066406401² = 33071322036187545602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4066406471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7911040 + ... + 7911553.

It is an arithmetic number, because the mean of its divisors is an integer number (1020557313).

Almost surely, 2^4066406401 is an apocalyptic number.

It is an amenable number.

4066406401 is a deficient number, since it is larger than the sum of its proper divisors (15822851).

4066406401 is a wasteful number, since it uses less digits than its factorization.

4066406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822850.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 4066406401 is about 63768.3808873959. The cubic root of 4066406401 is about 1596.1373492567.

The spelling of 4066406401 in words is "four billion, sixty-six million, four hundred six thousand, four hundred one".