64664850 has 24 divisors (see below), whose sum is σ = 160369200. Its totient is φ = 17243920.

The previous prime is 64664839. The next prime is 64664869. The reversal of 64664850 is 5846646.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64664799 and 64664808.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215400 + ... + 215699.

It is an arithmetic number, because the mean of its divisors is an integer number (6682050).

Almost surely, 2^64664850 is an apocalyptic number.

64664850 is an abundant number, since it is smaller than the sum of its proper divisors (95704350).

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

64664850 is a wasteful number, since it uses less digits than its factorization.

64664850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431114 (or 431109 counting only the distinct ones).

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

The square root of 64664850 is about 8041.4457655325. The cubic root of 64664850 is about 401.3803353732.

The spelling of 64664850 in words is "sixty-four million, six hundred sixty-four thousand, eight hundred fifty".