664454700 has 648 divisors, whose sum is σ = 2791435920. Its totient is φ = 130636800.

The previous prime is 664454689. The next prime is 664454737. The reversal of 664454700 is 7454466.

664454700 is a `hidden beast` number, since 6 + 644 + 5 + 4 + 7 + 0 + 0 = 666.

664454700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×664454700³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 10892670 + ... + 10892730.

Almost surely, 2^664454700 is an apocalyptic number.

664454700 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 664454700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395717960).

664454700 is an abundant number, since it is smaller than the sum of its proper divisors (2126981220).

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

664454700 is a wasteful number, since it uses less digits than its factorization.

664454700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 664454700 is about 25777.0188346131. The cubic root of 664454700 is about 872.6132287651.

The spelling of 664454700 in words is "six hundred sixty-four million, four hundred fifty-four thousand, seven hundred".