64665480 has 64 divisors (see below), whose sum is σ = 211636800. Its totient is φ = 15676160.

The previous prime is 64665457. The next prime is 64665481. The reversal of 64665480 is 8456646.

It is not an unprimeable number, because it can be changed into a prime (64665481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23175 + ... + 25814.

It is an arithmetic number, because the mean of its divisors is an integer number (3306825).

Almost surely, 2^64665480 is an apocalyptic number.

64665480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64665480 is an abundant number, since it is smaller than the sum of its proper divisors (146971320).

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

64665480 is a wasteful number, since it uses less digits than its factorization.

64665480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49014 (or 49010 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 64665480 is about 8041.4849374976. The cubic root of 64665480 is about 401.3816388572.

The spelling of 64665480 in words is "sixty-four million, six hundred sixty-five thousand, four hundred eighty".