1066491493 has 8 divisors (see below), whose sum is σ = 1105034400. Its totient is φ = 1028630928.

The previous prime is 1066491469. The next prime is 1066491509. The reversal of 1066491493 is 3941946601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1066491493 - 2⁹ = 1066490981 is a prime.

It is a super-2 number, since 2×1066491493² = 2274808209282738098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066498493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167403 + ... + 173656.

It is an arithmetic number, because the mean of its divisors is an integer number (138129300).

Almost surely, 2^1066491493 is an apocalyptic number.

It is an amenable number.

1066491493 is a deficient number, since it is larger than the sum of its proper divisors (38542907).

1066491493 is an equidigital number, since it uses as much as digits as its factorization.

1066491493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341171.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1066491493 is about 32657.1813388725. The cubic root of 1066491493 is about 1021.6899746155.

The spelling of 1066491493 in words is "one billion, sixty-six million, four hundred ninety-one thousand, four hundred ninety-three".