1066205765 has 8 divisors (see below), whose sum is σ = 1280519448. Its totient is φ = 852249600.

The previous prime is 1066205759. The next prime is 1066205771. The reversal of 1066205765 is 5675026601.

It is an interprime number because it is at equal distance from previous prime (1066205759) and next prime (1066205771).

It can be written as a sum of positive squares in 4 ways, for example, as 770884 + 1065434881 = 878^2 + 32641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1066205765 - 2¹⁴ = 1066189381 is a prime.

It is a super-2 number, since 2×1066205765² = 2273589466638470450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82772 + ... + 94781.

It is an arithmetic number, because the mean of its divisors is an integer number (160064931).

Almost surely, 2^1066205765 is an apocalyptic number.

It is an amenable number.

1066205765 is a deficient number, since it is larger than the sum of its proper divisors (214313683).

1066205765 is a wasteful number, since it uses less digits than its factorization.

1066205765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178759.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1066205765 is about 32652.8063878130. The cubic root of 1066205765 is about 1021.5987247840.

The spelling of 1066205765 in words is "one billion, sixty-six million, two hundred five thousand, seven hundred sixty-five".