16600616661558 has 8 divisors (see below), whose sum is σ = 33201233323128. Its totient is φ = 5533538887184.

The previous prime is 16600616661527. The next prime is 16600616661631. The reversal of 16600616661558 is 85516661600661.

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

16600616661558 is an admirable number.

It is a super-2 number, since 2×16600616661558² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16600616661498 and 16600616661507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383384721791 + ... + 1383384721802.

It is an arithmetic number, because the mean of its divisors is an integer number (4150154165391).

Almost surely, 2^{16600616661558} is an apocalyptic number.

16600616661558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16600616661558 is a wasteful number, since it uses less digits than its factorization.

16600616661558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766769443598.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 16600616661558 in words is "sixteen trillion, six hundred billion, six hundred sixteen million, six hundred sixty-one thousand, five hundred fifty-eight".