1664411325 has 12 divisors (see below), whose sum is σ = 2751826848. Its totient is φ = 887686000.

The previous prime is 1664411321. The next prime is 1664411351. The reversal of 1664411325 is 5231144661.

It is not a de Polignac number, because 1664411325 - 2² = 1664411321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664411321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11096001 + ... + 11096150.

It is an arithmetic number, because the mean of its divisors is an integer number (229318904).

Almost surely, 2^1664411325 is an apocalyptic number.

1664411325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1664411325 is a deficient number, since it is larger than the sum of its proper divisors (1087415523).

1664411325 is a wasteful number, since it uses less digits than its factorization.

1664411325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22192164 (or 22192159 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1664411325 is about 40797.1975140450. The cubic root of 1664411325 is about 1185.0960594386.

Adding to 1664411325 its reverse (5231144661), we get a palindrome (6895555986).

The spelling of 1664411325 in words is "one billion, six hundred sixty-four million, four hundred eleven thousand, three hundred twenty-five".