1066642065 has 12 divisors (see below), whose sum is σ = 1848846324. Its totient is φ = 568875744.

The previous prime is 1066642037. The next prime is 1066642081. The reversal of 1066642065 is 5602466601.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123476544 + 943165521 = 11112^2 + 30711^2 .

It is not a de Polignac number, because 1066642065 - 2¹¹ = 1066640017 is a prime.

It is a super-2 number, since 2×1066642065² = 2275450589654928450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 11851534 + ... + 11851623.

It is an arithmetic number, because the mean of its divisors is an integer number (154070527).

Almost surely, 2^1066642065 is an apocalyptic number.

1066642065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066642065 is a deficient number, since it is larger than the sum of its proper divisors (782204259).

1066642065 is a wasteful number, since it uses less digits than its factorization.

1066642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23703168 (or 23703165 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1066642065 is about 32659.4866003739. The cubic root of 1066642065 is about 1021.7380545938.

The spelling of 1066642065 in words is "one billion, sixty-six million, six hundred forty-two thousand, sixty-five".