664652214 has 96 divisors (see below), whose sum is σ = 1529708544. Its totient is φ = 208293120.

The previous prime is 664652203. The next prime is 664652251. The reversal of 664652214 is 412256466.

664652214 is a `hidden beast` number, since 6 + 646 + 5 + 2 + 2 + 1 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5233419 + ... + 5233545.

It is an arithmetic number, because the mean of its divisors is an integer number (15934464).

Almost surely, 2^664652214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664652214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764854272).

664652214 is an abundant number, since it is smaller than the sum of its proper divisors (865056330).

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

664652214 is a wasteful number, since it uses less digits than its factorization.

664652214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 359 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 664652214 is about 25780.8497532568. The cubic root of 664652214 is about 872.6996837455.

The spelling of 664652214 in words is "six hundred sixty-four million, six hundred fifty-two thousand, two hundred fourteen".