1066730644 has 24 divisors (see below), whose sum is σ = 2137869440. Its totient is φ = 456225696.

The previous prime is 1066730633. The next prime is 1066730653. The reversal of 1066730644 is 4460376601.

It is a super-2 number, since 2×1066730644² = 2275828533697309472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25479 + ... + 52750.

Almost surely, 2^1066730644 is an apocalyptic number.

1066730644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1066730644 is an abundant number, since it is smaller than the sum of its proper divisors (1071138796).

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

1066730644 is a wasteful number, since it uses less digits than its factorization.

1066730644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78727 (or 78725 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1066730644 is about 32660.8426713090. The cubic root of 1066730644 is about 1021.7663371305.

The spelling of 1066730644 in words is "one billion, sixty-six million, seven hundred thirty thousand, six hundred forty-four".