6412056666 has 16 divisors (see below), whose sum is σ = 13136897088. Its totient is φ = 2085221600.

The previous prime is 6412056659. The next prime is 6412056697. The reversal of 6412056666 is 6666502146.

It is a happy number.

It is a super-2 number, since 2×6412056666² = 82228941375990071112, which contains 22 as substring.

It is a Curzon 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, 13032390 + ... + 13032881.

It is an arithmetic number, because the mean of its divisors is an integer number (821056068).

Almost surely, 2^6412056666 is an apocalyptic number.

6412056666 is an abundant number, since it is smaller than the sum of its proper divisors (6724840422).

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

6412056666 is a wasteful number, since it uses less digits than its factorization.

6412056666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26065317.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 6412056666 is about 80075.3187068275. The cubic root of 6412056666 is about 1857.8006788939.

It can be divided in two parts, 64120 and 56666, that added together give a triangular number (120786 = T₄₉₁).

The spelling of 6412056666 in words is "six billion, four hundred twelve million, fifty-six thousand, six hundred sixty-six".