1026072661 has 2 divisors, whose sum is σ = 1026072662. Its totient is φ = 1026072660.

The previous prime is 1026072653. The next prime is 1026072667. The reversal of 1026072661 is 1662706201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810540900 + 215531761 = 28470^2 + 14681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026072661 - 2³ = 1026072653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026072667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513036330 + 513036331.

It is an arithmetic number, because the mean of its divisors is an integer number (513036331).

Almost surely, 2^1026072661 is an apocalyptic number.

It is an amenable number.

1026072661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026072661 is an equidigital number, since it uses as much as digits as its factorization.

1026072661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1026072661 is about 32032.3689570409. The cubic root of 1026072661 is about 1008.6164308826.

Adding to 1026072661 its reverse (1662706201), we get a palindrome (2688778862).

The spelling of 1026072661 in words is "one billion, twenty-six million, seventy-two thousand, six hundred sixty-one".