1664341000 has 64 divisors (see below), whose sum is σ = 4450942080. Its totient is φ = 570628800.

The previous prime is 1664340961. The next prime is 1664341009. The reversal of 1664341000 is 1434661.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1664341009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111882 + ... + 125881.

It is an arithmetic number, because the mean of its divisors is an integer number (69545970).

Almost surely, 2^1664341000 is an apocalyptic number.

1664341000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664341000 is an abundant number, since it is smaller than the sum of its proper divisors (2786601080).

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

1664341000 is a wasteful number, since it uses less digits than its factorization.

1664341000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237791 (or 237777 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1664341000 is about 40796.3356197588. The cubic root of 1664341000 is about 1185.0793682412.

Adding to 1664341000 its reverse (1434661), we get a palindrome (1665775661).

The spelling of 1664341000 in words is "one billion, six hundred sixty-four million, three hundred forty-one thousand".