64662120 has 96 divisors (see below), whose sum is σ = 214180200. Its totient is φ = 16912896.

The previous prime is 64662113. The next prime is 64662121. The reversal of 64662120 is 2126646.

It is a happy number.

64662120 is a `hidden beast` number, since 646 + 6 + 2 + 12 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 64545156 + 116964 = 8034^2 + 342^2 .

It is not an unprimeable number, because it can be changed into a prime (64662121) 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, 17386 + ... + 20774.

Almost surely, 2^64662120 is an apocalyptic number.

64662120 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 64662120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107090100).

64662120 is an abundant number, since it is smaller than the sum of its proper divisors (149518080).

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

64662120 is a wasteful number, since it uses less digits than its factorization.

64662120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3452 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 64662120 is about 8041.2760181454. The cubic root of 64662120 is about 401.3746868447.

Adding to 64662120 its reverse (2126646), we get a palindrome (66788766).

The spelling of 64662120 in words is "sixty-four million, six hundred sixty-two thousand, one hundred twenty".