553547666 has 32 divisors (see below), whose sum is σ = 965530368. Its totient is φ = 233110080.

The previous prime is 553547663. The next prime is 553547677. The reversal of 553547666 is 666745355.

553547666 = T₁ + T₂ + ... + T₁₄₉₁.

553547666 is a nontrivial binomial coefficient, being equal to C(1493, 3).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 553547666.

It is not an unprimeable number, because it can be changed into a prime (553547663) by changing a digit.

It is the 1491-st tetrahedral number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370016 + ... + 371508.

It is an arithmetic number, because the mean of its divisors is an integer number (30172824).

Almost surely, 2^553547666 is an apocalyptic number.

553547666 is a deficient number, since it is larger than the sum of its proper divisors (411982702).

553547666 is a wasteful number, since it uses less digits than its factorization.

553547666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

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

The square root of 553547666 is about 23527.5937146152. The cubic root of 553547666 is about 821.0791196091.

The spelling of 553547666 in words is "five hundred fifty-three million, five hundred forty-seven thousand, six hundred sixty-six".