1660617255 has 64 divisors (see below), whose sum is σ = 2946295296. Its totient is φ = 792000000.

The previous prime is 1660617251. The next prime is 1660617317. The reversal of 1660617255 is 5527160661.

It is not a de Polignac number, because 1660617255 - 2² = 1660617251 is a prime.

It is a super-3 number, since 3×1660617255³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660617251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4182717 + ... + 4183113.

It is an arithmetic number, because the mean of its divisors is an integer number (46035864).

Almost surely, 2^1660617255 is an apocalyptic number.

1660617255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1660617255 is a deficient number, since it is larger than the sum of its proper divisors (1285678041).

1660617255 is a wasteful number, since it uses less digits than its factorization.

1660617255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1660617255 is about 40750.6718349526. The cubic root of 1660617255 is about 1184.1948883201.

The spelling of 1660617255 in words is "one billion, six hundred sixty million, six hundred seventeen thousand, two hundred fifty-five".