1560166555 has 4 divisors (see below), whose sum is σ = 1872199872. Its totient is φ = 1248133240.

The previous prime is 1560166547. The next prime is 1560166583. The reversal of 1560166555 is 5556610651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5556610651 = 39623 ⋅140237.

It is not a de Polignac number, because 1560166555 - 2³ = 1560166547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156016651 + ... + 156016660.

It is an arithmetic number, because the mean of its divisors is an integer number (468049968).

Almost surely, 2^1560166555 is an apocalyptic number.

1560166555 is a deficient number, since it is larger than the sum of its proper divisors (312033317).

1560166555 is an equidigital number, since it uses as much as digits as its factorization.

1560166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312033316.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 1560166555 is about 39498.9437200541. The cubic root of 1560166555 is about 1159.8192730235.

The spelling of 1560166555 in words is "one billion, five hundred sixty million, one hundred sixty-six thousand, five hundred fifty-five".