160665555 has 48 divisors (see below), whose sum is σ = 278407584. Its totient is φ = 78842880.

The previous prime is 160665551. The next prime is 160665563. The reversal of 160665555 is 555566061.

It is not a de Polignac number, because 160665555 - 2² = 160665551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (160665551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 887565 + ... + 887745.

It is an arithmetic number, because the mean of its divisors is an integer number (5800158).

Almost surely, 2^160665555 is an apocalyptic number.

160665555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

160665555 is a deficient number, since it is larger than the sum of its proper divisors (117742029).

160665555 is a wasteful number, since it uses less digits than its factorization.

160665555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 160665555 is about 12675.3917099236. The cubic root of 160665555 is about 543.6352295753.

It can be divided in two parts, 1606 and 65555, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 160665555 in words is "one hundred sixty million, six hundred sixty-five thousand, five hundred fifty-five".