1075266661 has 4 divisors (see below), whose sum is σ = 1228876192. Its totient is φ = 921657132.

The previous prime is 1075266653. The next prime is 1075266679. The reversal of 1075266661 is 1666625701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1075266661 - 2³ = 1075266653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1075266691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76804755 + ... + 76804768.

It is an arithmetic number, because the mean of its divisors is an integer number (307219048).

Almost surely, 2^1075266661 is an apocalyptic number.

It is an amenable number.

1075266661 is a deficient number, since it is larger than the sum of its proper divisors (153609531).

1075266661 is an equidigital number, since it uses as much as digits as its factorization.

1075266661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153609530.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1075266661 is about 32791.2589114843. The cubic root of 1075266661 is about 1024.4845033500.

The spelling of 1075266661 in words is "one billion, seventy-five million, two hundred sixty-six thousand, six hundred sixty-one".