1066351591 has 2 divisors, whose sum is σ = 1066351592. Its totient is φ = 1066351590.

The previous prime is 1066351577. The next prime is 1066351603. The reversal of 1066351591 is 1951536601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1066351591 - 2¹⁵ = 1066318823 is a prime.

It is a super-2 number, since 2×1066351591² = 2274211431256462562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066351591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066351511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533175795 + 533175796.

It is an arithmetic number, because the mean of its divisors is an integer number (533175796).

Almost surely, 2^1066351591 is an apocalyptic number.

1066351591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066351591 is an equidigital number, since it uses as much as digits as its factorization.

1066351591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1066351591 is about 32655.0392895185. The cubic root of 1066351591 is about 1021.6452976780.

The spelling of 1066351591 in words is "one billion, sixty-six million, three hundred fifty-one thousand, five hundred ninety-one".