1066669940 has 48 divisors (see below), whose sum is σ = 2622461184. Its totient is φ = 356793600.

The previous prime is 1066669927. The next prime is 1066669951. The reversal of 1066669940 is 499666601.

It is a super-2 number, since 2×1066669940² = 2275569521799207200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87176 + ... + 98655.

It is an arithmetic number, because the mean of its divisors is an integer number (54634608).

Almost surely, 2^1066669940 is an apocalyptic number.

1066669940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066669940 is an abundant number, since it is smaller than the sum of its proper divisors (1555791244).

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

1066669940 is a wasteful number, since it uses less digits than its factorization.

1066669940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185888 (or 185886 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 1066669940 is about 32659.9133495483. The cubic root of 1066669940 is about 1021.7469550179.

The spelling of 1066669940 in words is "one billion, sixty-six million, six hundred sixty-nine thousand, nine hundred forty".