1066647783 has 24 divisors (see below), whose sum is σ = 1549456896. Its totient is φ = 651920400.

The previous prime is 1066647781. The next prime is 1066647787. The reversal of 1066647783 is 3877466601.

It is not a de Polignac number, because 1066647783 - 2¹ = 1066647781 is a prime.

It is a super-2 number, since 2×1066647783² = 2275474985957630178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066647781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17688 + ... + 49458.

It is an arithmetic number, because the mean of its divisors is an integer number (64560704).

Almost surely, 2^1066647783 is an apocalyptic number.

1066647783 is a deficient number, since it is larger than the sum of its proper divisors (482809113).

1066647783 is a wasteful number, since it uses less digits than its factorization.

1066647783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31843 (or 31824 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 1066647783 is about 32659.5741399057. The cubic root of 1066647783 is about 1021.7398803509.

The spelling of 1066647783 in words is "one billion, sixty-six million, six hundred forty-seven thousand, seven hundred eighty-three".