1664846925 has 96 divisors (see below), whose sum is σ = 3247411200. Its totient is φ = 736853760.

The previous prime is 1664846923. The next prime is 1664846947. The reversal of 1664846925 is 5296484661.

It is not a de Polignac number, because 1664846925 - 2¹ = 1664846923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664846921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2689266 + ... + 2689884.

It is an arithmetic number, because the mean of its divisors is an integer number (33827200).

Almost surely, 2^1664846925 is an apocalyptic number.

1664846925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1664846925 is a deficient number, since it is larger than the sum of its proper divisors (1582564275).

1664846925 is a wasteful number, since it uses less digits than its factorization.

1664846925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795 (or 790 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 1664846925 is about 40802.5357667878. The cubic root of 1664846925 is about 1185.1994358912.

The spelling of 1664846925 in words is "one billion, six hundred sixty-four million, eight hundred forty-six thousand, nine hundred twenty-five".