664545000 has 160 divisors (see below), whose sum is σ = 2372990400. Its totient is φ = 151872000.

The previous prime is 664544999. The next prime is 664545017. The reversal of 664545000 is 545466.

664545000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 101836 + ... + 108164.

It is an arithmetic number, because the mean of its divisors is an integer number (14831190).

Almost surely, 2^664545000 is an apocalyptic number.

664545000 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 664545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186495200).

664545000 is an abundant number, since it is smaller than the sum of its proper divisors (1708445400).

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

664545000 is a wasteful number, since it uses less digits than its factorization.

664545000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6365 (or 6346 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 664545000 is about 25778.7703352972. The cubic root of 664545000 is about 872.6527566191.

The spelling of 664545000 in words is "six hundred sixty-four million, five hundred forty-five thousand".