1066187685 has 16 divisors (see below), whose sum is σ = 1718176320. Its totient is φ = 564541440.

The previous prime is 1066187669. The next prime is 1066187699. The reversal of 1066187685 is 5867816601.

It is not a de Polignac number, because 1066187685 - 2⁴ = 1066187669 is a prime.

It is a super-2 number, since 2×1066187685² = 2273512359291318450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253596 + ... + 257765.

It is an arithmetic number, because the mean of its divisors is an integer number (107386020).

Almost surely, 2^1066187685 is an apocalyptic number.

1066187685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066187685 is a deficient number, since it is larger than the sum of its proper divisors (651988635).

1066187685 is a wasteful number, since it uses less digits than its factorization.

1066187685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511508.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1066187685 is about 32652.5295344786. The cubic root of 1066187685 is about 1021.5929502234.

It can be divided in two parts, 10661 and 87685, that added together give a triangular number (98346 = T₄₄₃).

The spelling of 1066187685 in words is "one billion, sixty-six million, one hundred eighty-seven thousand, six hundred eighty-five".