101534555666 has 4 divisors (see below), whose sum is σ = 152301833502. Its totient is φ = 50767277832.

The previous prime is 101534555663. The next prime is 101534555671. The reversal of 101534555666 is 666555435101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666555435101 = 491 ⋅1357546711.

It can be written as a sum of positive squares in only one way, i.e., 64854262225 + 36680293441 = 254665^2 + 191521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 101534555666.

It is not an unprimeable number, because it can be changed into a prime (101534555663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25383638915 + ... + 25383638918.

Almost surely, 2^101534555666 is an apocalyptic number.

101534555666 is a deficient number, since it is larger than the sum of its proper divisors (50767277836).

101534555666 is an equidigital number, since it uses as much as digits as its factorization.

101534555666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50767277835.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 101534555666 in words is "one hundred one billion, five hundred thirty-four million, five hundred fifty-five thousand, six hundred sixty-six".