1011533166 has 144 divisors (see below), whose sum is σ = 2679337440. Its totient is φ = 274619520.

The previous prime is 1011533147. The next prime is 1011533177. The reversal of 1011533166 is 6613351101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1815760 + ... + 1816316.

It is an arithmetic number, because the mean of its divisors is an integer number (18606510).

Almost surely, 2^1011533166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011533166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339668720).

1011533166 is an abundant number, since it is smaller than the sum of its proper divisors (1667804274).

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

1011533166 is a wasteful number, since it uses less digits than its factorization.

1011533166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1011533166 is about 31804.6091942662. The cubic root of 1011533166 is about 1003.8297033162.

Adding to 1011533166 its reverse (6613351101), we get a palindrome (7624884267).

The spelling of 1011533166 in words is "one billion, eleven million, five hundred thirty-three thousand, one hundred sixty-six".