1660173853 has 8 divisors (see below), whose sum is σ = 1788196088. Its totient is φ = 1532196864.

The previous prime is 1660173847. The next prime is 1660173863. The reversal of 1660173853 is 3583710661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6775609 + 1653398244 = 2603^2 + 40662^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660173853 - 2⁹ = 1660173341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660173803) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 137101 + ... + 148717.

It is an arithmetic number, because the mean of its divisors is an integer number (223524511).

Almost surely, 2^1660173853 is an apocalyptic number.

1660173853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1660173853 is a deficient number, since it is larger than the sum of its proper divisors (128022235).

1660173853 is a wasteful number, since it uses less digits than its factorization.

1660173853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22623.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1660173853 is about 40745.2310460991. The cubic root of 1660173853 is about 1184.0894815061.

The spelling of 1660173853 in words is "one billion, six hundred sixty million, one hundred seventy-three thousand, eight hundred fifty-three".