107666665 has 4 divisors (see below), whose sum is σ = 129200004. Its totient is φ = 86133328.

The previous prime is 107666639. The next prime is 107666683. The reversal of 107666665 is 566666701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566666701 = 31 ⋅18279571.

It can be written as a sum of positive squares in 2 ways, for example, as 81072016 + 26594649 = 9004^2 + 5157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107666665 is a prime.

It is a super-2 number, since 2×107666665² = 23184221504444450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10766662 + ... + 10766671.

It is an arithmetic number, because the mean of its divisors is an integer number (32300001).

Almost surely, 2^107666665 is an apocalyptic number.

It is an amenable number.

107666665 is a deficient number, since it is larger than the sum of its proper divisors (21533339).

107666665 is an equidigital number, since it uses as much as digits as its factorization.

107666665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21533338.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 107666665 is about 10376.2548638707. The cubic root of 107666665 is about 475.7298696213.

The spelling of 107666665 in words is "one hundred seven million, six hundred sixty-six thousand, six hundred sixty-five".