64866020 has 24 divisors (see below), whose sum is σ = 136987200. Its totient is φ = 25800032.

The previous prime is 64866007. The next prime is 64866037. The reversal of 64866020 is 2066846.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5480 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (5707800).

Almost surely, 2^64866020 is an apocalyptic number.

It is an amenable number.

64866020 is an abundant number, since it is smaller than the sum of its proper divisors (72121180).

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

64866020 is a wasteful number, since it uses less digits than its factorization.

64866020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307 (or 18305 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 64866020 is about 8053.9443752735. The cubic root of 64866020 is about 401.7961310447.

The spelling of 64866020 in words is "sixty-four million, eight hundred sixty-six thousand, twenty".