10165666666 has 4 divisors (see below), whose sum is σ = 15248500002. Its totient is φ = 5082833332.

The previous prime is 10165666631. The next prime is 10165666697. The reversal of 10165666666 is 66666656101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66666656101 = 229 ⋅291120769.

It can be written as a sum of positive squares in only one way, i.e., 10091207025 + 74459641 = 100455^2 + 8629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2541416665 + ... + 2541416668.

Almost surely, 2^10165666666 is an apocalyptic number.

10165666666 is a deficient number, since it is larger than the sum of its proper divisors (5082833336).

10165666666 is an equidigital number, since it uses as much as digits as its factorization.

10165666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082833335.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 10165666666 in words is "ten billion, one hundred sixty-five million, six hundred sixty-six thousand, six hundred sixty-six".