66551723354 has 16 divisors (see below), whose sum is σ = 101208335976. Its totient is φ = 32818176000.

The previous prime is 66551723309. The next prime is 66551723417. The reversal of 66551723354 is 45332715566.

It can be written as a sum of positive squares in 4 ways, for example, as 65343118129 + 1208605225 = 255623^2 + 34765^2 .

It is a super-3 number, since 3×66551723354³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66551723299 and 66551723308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589067 + ... + 692894.

Almost surely, 2^66551723354 is an apocalyptic number.

66551723354 is a deficient number, since it is larger than the sum of its proper divisors (34656612622).

66551723354 is a wasteful number, since it uses less digits than its factorization.

66551723354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282321.

The product of its digits is 2268000, while the sum is 47.

The spelling of 66551723354 in words is "sixty-six billion, five hundred fifty-one million, seven hundred twenty-three thousand, three hundred fifty-four".