1099779066 has 64 divisors (see below), whose sum is σ = 2510438400. Its totient is φ = 356756400.

The previous prime is 1099779059. The next prime is 1099779067. The reversal of 1099779066 is 6609779901.

1099779066 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1099779067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301071 + ... + 304701.

It is an arithmetic number, because the mean of its divisors is an integer number (39225600).

Almost surely, 2^1099779066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099779066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255219200).

1099779066 is an abundant number, since it is smaller than the sum of its proper divisors (1410659334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1099779066 is a wasteful number, since it uses less digits than its factorization.

1099779066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792 (or 3786 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 1099779066 is about 33162.9170309248. The cubic root of 1099779066 is about 1032.2109999880.

The spelling of 1099779066 in words is "one billion, ninety-nine million, seven hundred seventy-nine thousand, sixty-six".