1066645145 has 4 divisors (see below), whose sum is σ = 1279974180. Its totient is φ = 853316112.

The previous prime is 1066645091. The next prime is 1066645157. The reversal of 1066645145 is 5415466601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196336144 + 870309001 = 14012^2 + 29501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066645145 - 2¹² = 1066641049 is a prime.

It is a super-2 number, since 2×1066645145² = 2275463730704142050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066645099 and 1066645108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106664510 + ... + 106664519.

It is an arithmetic number, because the mean of its divisors is an integer number (319993545).

Almost surely, 2^1066645145 is an apocalyptic number.

It is an amenable number.

1066645145 is a deficient number, since it is larger than the sum of its proper divisors (213329035).

1066645145 is an equidigital number, since it uses as much as digits as its factorization.

1066645145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213329034.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 1066645145 is about 32659.5337535611. The cubic root of 1066645145 is about 1021.7390380385.

The spelling of 1066645145 in words is "one billion, sixty-six million, six hundred forty-five thousand, one hundred forty-five".