1426766991 has 8 divisors (see below), whose sum is σ = 2048691120. Its totient is φ = 878010432.

The previous prime is 1426766989. The next prime is 1426767011. The reversal of 1426766991 is 1996676241.

1426766991 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1426766991 - 2¹ = 1426766989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426776991) 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, 18291846 + ... + 18291923.

It is an arithmetic number, because the mean of its divisors is an integer number (256086390).

Almost surely, 2^1426766991 is an apocalyptic number.

1426766991 is a deficient number, since it is larger than the sum of its proper divisors (621924129).

1426766991 is a wasteful number, since it uses less digits than its factorization.

1426766991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36583785.

The product of its digits is 979776, while the sum is 51.

The square root of 1426766991 is about 37772.5692930730. The cubic root of 1426766991 is about 1125.7734903881.

The spelling of 1426766991 in words is "one billion, four hundred twenty-six million, seven hundred sixty-six thousand, nine hundred ninety-one".