64662040 has 16 divisors (see below), whose sum is σ = 145489680. Its totient is φ = 25864800.

The previous prime is 64662007. The next prime is 64662077. The reversal of 64662040 is 4026646.

64662040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808236 + ... + 808315.

It is an arithmetic number, because the mean of its divisors is an integer number (9093105).

Almost surely, 2^64662040 is an apocalyptic number.

It is an amenable number.

64662040 is an abundant number, since it is smaller than the sum of its proper divisors (80827640).

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

64662040 is a wasteful number, since it uses less digits than its factorization.

64662040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616562 (or 1616558 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64662040 is about 8041.2710438089. The cubic root of 64662040 is about 401.3745213177.

Adding to 64662040 its reverse (4026646), we get a palindrome (68688686).

The spelling of 64662040 in words is "sixty-four million, six hundred sixty-two thousand, forty".