1066500080 has 20 divisors (see below), whose sum is σ = 2479612872. Its totient is φ = 426600000.

The previous prime is 1066500067. The next prime is 1066500089. The reversal of 1066500080 is 800056601.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1066500080² = 2274844841280012800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066500089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6665546 + ... + 6665705.

Almost surely, 2^1066500080 is an apocalyptic number.

1066500080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066500080 is an abundant number, since it is smaller than the sum of its proper divisors (1413112792).

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

1066500080 is a wasteful number, since it uses less digits than its factorization.

1066500080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331264 (or 13331258 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1066500080 is about 32657.3128104564. The cubic root of 1066500080 is about 1021.6927166997.

Adding to 1066500080 its reverse (800056601), we get a palindrome (1866556681).

The spelling of 1066500080 in words is "one billion, sixty-six million, five hundred thousand, eighty".