56405672066 has 8 divisors (see below), whose sum is σ = 84616941180. Its totient is φ = 28200025008.

The previous prime is 56405672041. The next prime is 56405672069. The reversal of 56405672066 is 66027650465.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52736826025 + 3668846041 = 229645^2 + 60571^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 56405672066.

It is not an unprimeable number, because it can be changed into a prime (56405672069) 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, 1380341 + ... + 1420616.

Almost surely, 2^56405672066 is an apocalyptic number.

56405672066 is a deficient number, since it is larger than the sum of its proper divisors (28211269114).

56405672066 is a wasteful number, since it uses less digits than its factorization.

56405672066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811028.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 56405672066 in words is "fifty-six billion, four hundred five million, six hundred seventy-two thousand, sixty-six".