1066643446 has 32 divisors (see below), whose sum is σ = 1826323200. Its totient is φ = 462480480.

The previous prime is 1066643429. The next prime is 1066643447. The reversal of 1066643446 is 6443466601.

It is a super-2 number, since 2×1066643446² = 2275456481789509832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066643399 and 1066643408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066643447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194125 + ... + 199543.

It is an arithmetic number, because the mean of its divisors is an integer number (57072600).

Almost surely, 2^1066643446 is an apocalyptic number.

1066643446 is a deficient number, since it is larger than the sum of its proper divisors (759679754).

1066643446 is a wasteful number, since it uses less digits than its factorization.

1066643446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844.

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 1066643446 is about 32659.5077427692. The cubic root of 1066643446 is about 1021.7384955476.

It can be divided in two parts, 1066643 and 446, that added together give a square (1067089 = 1033²).

The spelling of 1066643446 in words is "one billion, sixty-six million, six hundred forty-three thousand, four hundred forty-six".