1066431287 has 2 divisors, whose sum is σ = 1066431288. Its totient is φ = 1066431286.

The previous prime is 1066431277. The next prime is 1066431299. The reversal of 1066431287 is 7821346601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1066431287 - 2²⁰ = 1065382711 is a prime.

It is a super-2 number, since 2×1066431287² = 2274551379784952738, 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 1066431287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066431277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533215643 + 533215644.

It is an arithmetic number, because the mean of its divisors is an integer number (533215644).

Almost surely, 2^1066431287 is an apocalyptic number.

1066431287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066431287 is an equidigital number, since it uses as much as digits as its factorization.

1066431287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1066431287 is about 32656.2595377977. The cubic root of 1066431287 is about 1021.6707486381.

Adding to 1066431287 its reverse (7821346601), we get a palindrome (8887777888).

The spelling of 1066431287 in words is "one billion, sixty-six million, four hundred thirty-one thousand, two hundred eighty-seven".