1664500016 has 20 divisors (see below), whose sum is σ = 3394704600. Its totient is φ = 788447232.

The previous prime is 1664500003. The next prime is 1664500043. The reversal of 1664500016 is 6100054661.

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, 2737361 + ... + 2737968.

It is an arithmetic number, because the mean of its divisors is an integer number (169735230).

Almost surely, 2^1664500016 is an apocalyptic number.

1664500016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1664500016 is an abundant number, since it is smaller than the sum of its proper divisors (1730204584).

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

1664500016 is a wasteful number, since it uses less digits than its factorization.

1664500016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475356 (or 5475350 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1664500016 is about 40798.2844737374. The cubic root of 1664500016 is about 1185.1171090206.

Adding to 1664500016 its reverse (6100054661), we get a palindrome (7764554677).

The spelling of 1664500016 in words is "one billion, six hundred sixty-four million, five hundred thousand, sixteen".