551066646 has 16 divisors (see below), whose sum is σ = 1186912944. Its totient is φ = 169558944.

The previous prime is 551066623. The next prime is 551066653. The reversal of 551066646 is 646660155.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3532401 + ... + 3532556.

It is an arithmetic number, because the mean of its divisors is an integer number (74182059).

Almost surely, 2^551066646 is an apocalyptic number.

551066646 is an abundant number, since it is smaller than the sum of its proper divisors (635846298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551066646 is a wasteful number, since it uses less digits than its factorization.

551066646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064975.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 551066646 is about 23474.8087532146. The cubic root of 551066646 is about 819.8505805478.

The spelling of 551066646 in words is "five hundred fifty-one million, sixty-six thousand, six hundred forty-six".