1144665566 has 12 divisors (see below), whose sum is σ = 1887279576. Its totient is φ = 520302420.

The previous prime is 1144665553. The next prime is 1144665601. The reversal of 1144665566 is 6655664411.

It is a super-2 number, since 2×1144665566² = 2620518515972200712, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2364770 + ... + 2365253.

It is an arithmetic number, because the mean of its divisors is an integer number (157273298).

Almost surely, 2^1144665566 is an apocalyptic number.

1144665566 is a deficient number, since it is larger than the sum of its proper divisors (742614010).

1144665566 is a wasteful number, since it uses less digits than its factorization.

1144665566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730047 (or 4730036 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 1144665566 is about 33832.9065556006. The cubic root of 1144665566 is about 1046.0670909590.

The spelling of 1144665566 in words is "one billion, one hundred forty-four million, six hundred sixty-five thousand, five hundred sixty-six".