64494660 has 48 divisors (see below), whose sum is σ = 181028736. Its totient is φ = 17156352.

The previous prime is 64494653. The next prime is 64494673. The reversal of 64494660 is 6649446.

It is a super-2 number, since 2×64494660² = 8319122337031200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29112 + ... + 31248.

It is an arithmetic number, because the mean of its divisors is an integer number (3771432).

Almost surely, 2^64494660 is an apocalyptic number.

64494660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64494660 is an abundant number, since it is smaller than the sum of its proper divisors (116534076).

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

64494660 is a wasteful number, since it uses less digits than its factorization.

64494660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2650 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 64494660 is about 8030.8567413446. The cubic root of 64494660 is about 401.0278979685.

The spelling of 64494660 in words is "sixty-four million, four hundred ninety-four thousand, six hundred sixty".