64664220846 has 32 divisors (see below), whose sum is σ = 130533596928. Its totient is φ = 21354058880.

The previous prime is 64664220799. The next prime is 64664220847. The reversal of 64664220846 is 64802246646.

It is a super-2 number, since 2×64664220846² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64664220795 and 64664220804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664220847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1515991 + ... + 1558061.

It is an arithmetic number, because the mean of its divisors is an integer number (4079174904).

Almost surely, 2^64664220846 is an apocalyptic number.

64664220846 is an abundant number, since it is smaller than the sum of its proper divisors (65869376082).

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

64664220846 is a wasteful number, since it uses less digits than its factorization.

64664220846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44456.

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 64664220846 in words is "sixty-four billion, six hundred sixty-four million, two hundred twenty thousand, eight hundred forty-six".