64661268 has 48 divisors (see below), whose sum is σ = 182577024. Its totient is φ = 17387520.

The previous prime is 64661249. The next prime is 64661273. The reversal of 64661268 is 86216646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21213 + ... + 24068.

It is an arithmetic number, because the mean of its divisors is an integer number (3803688).

Almost surely, 2^64661268 is an apocalyptic number.

64661268 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64661268 is an abundant number, since it is smaller than the sum of its proper divisors (117915756).

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

64661268 is a wasteful number, since it uses less digits than its factorization.

64661268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45312 (or 45310 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 64661268 is about 8041.2230413041. The cubic root of 64661268 is about 401.3729239747.

The spelling of 64661268 in words is "sixty-four million, six hundred sixty-one thousand, two hundred sixty-eight".