1066565650 has 12 divisors (see below), whose sum is σ = 1983812202. Its totient is φ = 426626240.

The previous prime is 1066565641. The next prime is 1066565651. The reversal of 1066565650 is 565656601.

It can be written as a sum of positive squares in 3 ways, for example, as 827770441 + 238795209 = 28771^2 + 15453^2 .

It is a super-2 number, since 2×1066565650² = 2275124571519845000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066565651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10665607 + ... + 10665706.

Almost surely, 2^1066565650 is an apocalyptic number.

1066565650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066565650 is a deficient number, since it is larger than the sum of its proper divisors (917246552).

1066565650 is a wasteful number, since it uses less digits than its factorization.

1066565650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21331325 (or 21331320 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 1066565650 is about 32658.3167049375. The cubic root of 1066565650 is about 1021.7136546630.

The spelling of 1066565650 in words is "one billion, sixty-six million, five hundred sixty-five thousand, six hundred fifty".