1617681066 has 16 divisors (see below), whose sum is σ = 3243088800. Its totient is φ = 537939248.

The previous prime is 1617681061. The next prime is 1617681073. The reversal of 1617681066 is 6601867161.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1617681061) 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, 319221 + ... + 324248.

It is an arithmetic number, because the mean of its divisors is an integer number (202693050).

Almost surely, 2^1617681066 is an apocalyptic number.

1617681066 is an abundant number, since it is smaller than the sum of its proper divisors (1625407734).

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

1617681066 is a wasteful number, since it uses less digits than its factorization.

1617681066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643893.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1617681066 is about 40220.4060894467. The cubic root of 1617681066 is about 1173.8996346458.

The spelling of 1617681066 in words is "one billion, six hundred seventeen million, six hundred eighty-one thousand, sixty-six".