6665666106 has 32 divisors (see below), whose sum is σ = 14936338368. Its totient is φ = 1965306240.

The previous prime is 6665666099. The next prime is 6665666107. The reversal of 6665666106 is 6016665666.

It is a super-2 number, since 2×6665666106² = 88862209273354406472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6665666107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1362355 + ... + 1367238.

It is an arithmetic number, because the mean of its divisors is an integer number (466760574).

Almost surely, 2^6665666106 is an apocalyptic number.

6665666106 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6665666106 is an abundant number, since it is smaller than the sum of its proper divisors (8270672262).

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

6665666106 is a wasteful number, since it uses less digits than its factorization.

6665666106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729646.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The square root of 6665666106 is about 81643.5307051330. The cubic root of 6665666106 is about 1881.9778966876.

The spelling of 6665666106 in words is "six billion, six hundred sixty-five million, six hundred sixty-six thousand, one hundred six".