1166628647 has 2 divisors, whose sum is σ = 1166628648. Its totient is φ = 1166628646.

The previous prime is 1166628623. The next prime is 1166628649. The reversal of 1166628647 is 7468266611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1166628647 - 2¹² = 1166624551 is a prime.

It is a super-2 number, since 2×1166628647² = 2722044800002101218, which contains 22 as substring.

Together with 1166628649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166628649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583314323 + 583314324.

It is an arithmetic number, because the mean of its divisors is an integer number (583314324).

Almost surely, 2^1166628647 is an apocalyptic number.

1166628647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166628647 is an equidigital number, since it uses as much as digits as its factorization.

1166628647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 1166628647 is about 34155.9459977322. The cubic root of 1166628647 is about 1052.7151639668.

The spelling of 1166628647 in words is "one billion, one hundred sixty-six million, six hundred twenty-eight thousand, six hundred forty-seven".