170141557666 has 4 divisors (see below), whose sum is σ = 255212336502. Its totient is φ = 85070778832.

The previous prime is 170141557639. The next prime is 170141557697. The reversal of 170141557666 is 666755141071.

170141557666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666755141071 = 8821 ⋅75587251.

It can be written as a sum of positive squares in only one way, i.e., 135439456441 + 34702101225 = 368021^2 + 186285^2 .

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, 42535389415 + ... + 42535389418.

Almost surely, 2^170141557666 is an apocalyptic number.

170141557666 is a deficient number, since it is larger than the sum of its proper divisors (85070778836).

170141557666 is an equidigital number, since it uses as much as digits as its factorization.

170141557666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85070778835.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 170141557666 in words is "one hundred seventy billion, one hundred forty-one million, five hundred fifty-seven thousand, six hundred sixty-six".