1066724646 has 16 divisors (see below), whose sum is σ = 2297560944. Its totient is φ = 328222944.

The previous prime is 1066724641. The next prime is 1066724647. The reversal of 1066724646 is 6464276601.

It is a happy number.

It is a super-2 number, since 2×1066724646² = 2275802940767650632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066724598 and 1066724607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066724641) 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, 6837901 + ... + 6838056.

It is an arithmetic number, because the mean of its divisors is an integer number (143597559).

Almost surely, 2^1066724646 is an apocalyptic number.

1066724646 is an abundant number, since it is smaller than the sum of its proper divisors (1230836298).

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

1066724646 is a wasteful number, since it uses less digits than its factorization.

1066724646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13675975.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 1066724646 is about 32660.7508486869. The cubic root of 1066724646 is about 1021.7644220685.

The spelling of 1066724646 in words is "one billion, sixty-six million, seven hundred twenty-four thousand, six hundred forty-six".