406261402066 has 8 divisors (see below), whose sum is σ = 656268418764. Its totient is φ = 187505262480.

The previous prime is 406261402033. The next prime is 406261402081. The reversal of 406261402066 is 660204162604.

It can be written as a sum of positive squares in 2 ways, for example, as 406234143225 + 27258841 = 637365^2 + 5221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7812719245 + ... + 7812719296.

Almost surely, 2^406261402066 is an apocalyptic number.

406261402066 is a deficient number, since it is larger than the sum of its proper divisors (250007016698).

406261402066 is a wasteful number, since it uses less digits than its factorization.

406261402066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15625438556.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 406261402066 in words is "four hundred six billion, two hundred sixty-one million, four hundred two thousand, sixty-six".