1066505678 has 32 divisors (see below), whose sum is σ = 1888185600. Its totient is φ = 451542840.

The previous prime is 1066505669. The next prime is 1066505683. The reversal of 1066505678 is 8765056601.

It is a super-2 number, since 2×1066505678² = 2274868722412479368, 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 15 ways as a sum of consecutive naturals, for example, 47573 + ... + 66303.

It is an arithmetic number, because the mean of its divisors is an integer number (59005800).

Almost surely, 2^1066505678 is an apocalyptic number.

1066505678 is a deficient number, since it is larger than the sum of its proper divisors (821679922).

1066505678 is an equidigital number, since it uses as much as digits as its factorization.

1066505678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837 (or 18823 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 1066505678 is about 32657.3985185593. The cubic root of 1066505678 is about 1021.6945042994.

The spelling of 1066505678 in words is "one billion, sixty-six million, five hundred five thousand, six hundred seventy-eight".