664367100 has 72 divisors (see below), whose sum is σ = 1926960000. Its totient is φ = 176729280.

The previous prime is 664367083. The next prime is 664367101. The reversal of 664367100 is 1763466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664367101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130401 + ... + 135399.

Almost surely, 2^664367100 is an apocalyptic number.

664367100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664367100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963480000).

664367100 is an abundant number, since it is smaller than the sum of its proper divisors (1262592900).

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

664367100 is a wasteful number, since it uses less digits than its factorization.

664367100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 664367100 is about 25775.3195906472. The cubic root of 664367100 is about 872.5748793846.

It can be divided in two parts, 66436 and 7100, that added together give a triangular number (73536 = T₃₈₃).

The spelling of 664367100 in words is "six hundred sixty-four million, three hundred sixty-seven thousand, one hundred".