2006289664 has 18 divisors (see below), whose sum is σ = 4004742770. Its totient is φ = 1003144704.

The previous prime is 2006289661. The next prime is 2006289679. The reversal of 2006289664 is 4669826002.

It can be written as a sum of positive squares in only one way, i.e., 1957177600 + 49112064 = 44240^2 + 7008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2006289664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006289661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3918279 + ... + 3918790.

Almost surely, 2^2006289664 is an apocalyptic number.

It is an amenable number.

2006289664 is a deficient number, since it is larger than the sum of its proper divisors (1998453106).

2006289664 is an frugal number, since it uses more digits than its factorization.

2006289664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837085 (or 7837071 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 2006289664 is about 44791.6249314534. The cubic root of 2006289664 is about 1261.2404144783.

The spelling of 2006289664 in words is "two billion, six million, two hundred eighty-nine thousand, six hundred sixty-four".