1668872964 has 48 divisors (see below), whose sum is σ = 4281532416. Its totient is φ = 501732000.

The previous prime is 1668872911. The next prime is 1668872969. The reversal of 1668872964 is 4692788661.

It is not an unprimeable number, because it can be changed into a prime (1668872969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33012 + ... + 66539.

It is an arithmetic number, because the mean of its divisors is an integer number (89198592).

Almost surely, 2^1668872964 is an apocalyptic number.

It is an amenable number.

1668872964 is an abundant number, since it is smaller than the sum of its proper divisors (2612659452).

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

1668872964 is a wasteful number, since it uses less digits than its factorization.

1668872964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99696 (or 99694 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The square root of 1668872964 is about 40851.8416231141. The cubic root of 1668872964 is about 1186.1540417597.

The spelling of 1668872964 in words is "one billion, six hundred sixty-eight million, eight hundred seventy-two thousand, nine hundred sixty-four".