1066447440 has 120 divisors (see below), whose sum is σ = 3737260800. Its totient is φ = 272017152.

The previous prime is 1066447427. The next prime is 1066447469. The reversal of 1066447440 is 447446601.

1066447440 is a `hidden beast` number, since 1 + 0 + 6 + 644 + 7 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×1066447440² = 2274620284565107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1066447395 and 1066447404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15640 + ... + 48759.

It is an arithmetic number, because the mean of its divisors is an integer number (31143840).

Almost surely, 2^1066447440 is an apocalyptic number.

1066447440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066447440 is an abundant number, since it is smaller than the sum of its proper divisors (2670813360).

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

1066447440 is a wasteful number, since it uses less digits than its factorization.

1066447440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64441 (or 64432 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 1066447440 is about 32656.5068554492. The cubic root of 1066447440 is about 1021.6759069527.

The spelling of 1066447440 in words is "one billion, sixty-six million, four hundred forty-seven thousand, four hundred forty".