1664600616 has 96 divisors (see below), whose sum is σ = 5189620800. Its totient is φ = 472158720.

The previous prime is 1664600603. The next prime is 1664600629. The reversal of 1664600616 is 6160064661.

1664600616 is a `hidden beast` number, since 1 + 6 + 646 + 0 + 0 + 6 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1664600603) and next prime (1664600629).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58176 + ... + 81936.

It is an arithmetic number, because the mean of its divisors is an integer number (54058550).

Almost surely, 2^1664600616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664600616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594810400).

1664600616 is an abundant number, since it is smaller than the sum of its proper divisors (3525020184).

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

1664600616 is a wasteful number, since it uses less digits than its factorization.

1664600616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23919 (or 23912 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1664600616 is about 40799.5173500864. The cubic root of 1664600616 is about 1185.1409841339.

The spelling of 1664600616 in words is "one billion, six hundred sixty-four million, six hundred thousand, six hundred sixteen".