106566615566 has 4 divisors (see below), whose sum is σ = 159849923352. Its totient is φ = 53283307782.

The previous prime is 106566615521. The next prime is 106566615577. The reversal of 106566615566 is 665516665601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×106566615566² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26641653890 + ... + 26641653893.

It is an arithmetic number, because the mean of its divisors is an integer number (39962480838).

Almost surely, 2^106566615566 is an apocalyptic number.

106566615566 is a deficient number, since it is larger than the sum of its proper divisors (53283307786).

106566615566 is an equidigital number, since it uses as much as digits as its factorization.

106566615566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53283307785.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 106566615566 in words is "one hundred six billion, five hundred sixty-six million, six hundred fifteen thousand, five hundred sixty-six".