1066276806 has 64 divisors (see below), whose sum is σ = 2540568576. Its totient is φ = 291924000.

The previous prime is 1066276801. The next prime is 1066276807. The reversal of 1066276806 is 6086726601.

It is a happy number.

It is a super-2 number, since 2×1066276806² = 2273892454027123272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066276801) 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, 130131 + ... + 138081.

It is an arithmetic number, because the mean of its divisors is an integer number (39696384).

Almost surely, 2^1066276806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066276806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270284288).

1066276806 is an abundant number, since it is smaller than the sum of its proper divisors (1474291770).

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

1066276806 is a wasteful number, since it uses less digits than its factorization.

1066276806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1066276806 is about 32653.8941934955. The cubic root of 1066276806 is about 1021.6214138951.

The spelling of 1066276806 in words is "one billion, sixty-six million, two hundred seventy-six thousand, eight hundred six".