1066720606 has 16 divisors (see below), whose sum is σ = 1830357216. Its totient is φ = 456742656.

The previous prime is 1066720583. The next prime is 1066720609. The reversal of 1066720606 is 6060276601.

It is a super-2 number, since 2×1066720606² = 2275785702530014472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066720609) 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, 19371 + ... + 50086.

It is an arithmetic number, because the mean of its divisors is an integer number (114397326).

Almost surely, 2^1066720606 is an apocalyptic number.

1066720606 is a deficient number, since it is larger than the sum of its proper divisors (763636610).

1066720606 is a wasteful number, since it uses less digits than its factorization.

1066720606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70563.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1066720606 is about 32660.6890006932. The cubic root of 1066720606 is about 1021.7631321594.

The spelling of 1066720606 in words is "one billion, sixty-six million, seven hundred twenty thousand, six hundred six".