1167028661 has 2 divisors, whose sum is σ = 1167028662. Its totient is φ = 1167028660.

The previous prime is 1167028657. The next prime is 1167028679. The reversal of 1167028661 is 1668207611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734139025 + 432889636 = 27095^2 + 20806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1167028661 - 2² = 1167028657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1167025661) 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 as a sum of consecutive naturals, namely, 583514330 + 583514331.

It is an arithmetic number, because the mean of its divisors is an integer number (583514331).

Almost surely, 2^1167028661 is an apocalyptic number.

It is an amenable number.

1167028661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1167028661 is an equidigital number, since it uses as much as digits as its factorization.

1167028661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1167028661 is about 34161.8011966582. The cubic root of 1167028661 is about 1052.8354686541.

The spelling of 1167028661 in words is "one billion, one hundred sixty-seven million, twenty-eight thousand, six hundred sixty-one".