1155666607 has 2 divisors, whose sum is σ = 1155666608. Its totient is φ = 1155666606.

The previous prime is 1155666563. The next prime is 1155666637. The reversal of 1155666607 is 7066665511.

It is a strong prime.

It is an emirp because it is prime and its reverse (7066665511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155666607 - 2¹⁹ = 1155142319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155666637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577833303 + 577833304.

It is an arithmetic number, because the mean of its divisors is an integer number (577833304).

Almost surely, 2^1155666607 is an apocalyptic number.

1155666607 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155666607 is an equidigital number, since it uses as much as digits as its factorization.

1155666607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1155666607 is about 33995.0968082163. The cubic root of 1155666607 is about 1049.4075590631.

The spelling of 1155666607 in words is "one billion, one hundred fifty-five million, six hundred sixty-six thousand, six hundred seven".