1659540617 has 8 divisors (see below), whose sum is σ = 1996440000. Its totient is φ = 1347596784.

The previous prime is 1659540607. The next prime is 1659540677. The reversal of 1659540617 is 7160459561.

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 1659540617 - 2⁴ = 1659540601 is a prime.

It is a super-3 number, since 3×1659540617³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1659540607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6238742 + ... + 6239007.

It is an arithmetic number, because the mean of its divisors is an integer number (249555000).

Almost surely, 2^1659540617 is an apocalyptic number.

It is an amenable number.

1659540617 is a deficient number, since it is larger than the sum of its proper divisors (336899383).

1659540617 is a wasteful number, since it uses less digits than its factorization.

1659540617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12477775.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 1659540617 is about 40737.4596287005. The cubic root of 1659540617 is about 1183.9389142551.

The spelling of 1659540617 in words is "one billion, six hundred fifty-nine million, five hundred forty thousand, six hundred seventeen".