6566046666 has 32 divisors (see below), whose sum is σ = 13187548608. Its totient is φ = 2179457280.

The previous prime is 6566046659. The next prime is 6566046673. The reversal of 6566046666 is 6666406656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6566046659) and next prime (6566046673).

It is a super-2 number, since 2×6566046666² = 86225937640179431112, which contains 22 as substring.

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, 2208561 + ... + 2211531.

It is an arithmetic number, because the mean of its divisors is an integer number (412110894).

Almost surely, 2^6566046666 is an apocalyptic number.

6566046666 is an abundant number, since it is smaller than the sum of its proper divisors (6621501942).

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

6566046666 is a wasteful number, since it uses less digits than its factorization.

6566046666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The square root of 6566046666 is about 81031.1462710481. The cubic root of 6566046666 is about 1872.5553126228. Note that the first 3 decimals are identical.

The spelling of 6566046666 in words is "six billion, five hundred sixty-six million, forty-six thousand, six hundred sixty-six".