1026316661 has 4 divisors (see below), whose sum is σ = 1030405824. Its totient is φ = 1022227500.

The previous prime is 1026316637. The next prime is 1026316717. The reversal of 1026316661 is 1666136201.

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 1026316661 - 2¹⁸ = 1026054517 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 (1026316631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2044205 + ... + 2044706.

It is an arithmetic number, because the mean of its divisors is an integer number (257601456).

Almost surely, 2^1026316661 is an apocalyptic number.

It is an amenable number.

1026316661 is a deficient number, since it is larger than the sum of its proper divisors (4089163).

1026316661 is an equidigital number, since it uses as much as digits as its factorization.

1026316661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089162.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1026316661 is about 32036.1773780830. The cubic root of 1026316661 is about 1008.6963741827.

The spelling of 1026316661 in words is "one billion, twenty-six million, three hundred sixteen thousand, six hundred sixty-one".