551011966 has 12 divisors (see below), whose sum is σ = 862702776. Its totient is φ = 263451320.

The previous prime is 551011961. The next prime is 551011969. The reversal of 551011966 is 669110155.

It is a super-2 number, since 2×551011966² = 607228373350370312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551011961) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 157476 + ... + 160936.

It is an arithmetic number, because the mean of its divisors is an integer number (71891898).

Almost surely, 2^551011966 is an apocalyptic number.

551011966 is a deficient number, since it is larger than the sum of its proper divisors (311690810).

551011966 is an frugal number, since it uses more digits than its factorization.

551011966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 551011966 is about 23473.6440715966. The cubic root of 551011966 is about 819.8234628885.

The spelling of 551011966 in words is "five hundred fifty-one million, eleven thousand, nine hundred sixty-six".