1066644240 has 80 divisors (see below), whose sum is σ = 3383527488. Its totient is φ = 277820928.

The previous prime is 1066644223. The next prime is 1066644269. The reversal of 1066644240 is 424466601.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1066644240² = 2275459869450355200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41359 + ... + 61998.

Almost surely, 2^1066644240 is an apocalyptic number.

1066644240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066644240 is an abundant number, since it is smaller than the sum of its proper divisors (2316883248).

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

1066644240 is a wasteful number, since it uses less digits than its factorization.

1066644240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103416 (or 103410 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 1066644240 is about 32659.5198984921. The cubic root of 1066644240 is about 1021.7387490720.

The spelling of 1066644240 in words is "one billion, sixty-six million, six hundred forty-four thousand, two hundred forty".