64665215982 has 12 divisors (see below), whose sum is σ = 140107968000. Its totient is φ = 21555071988.

The previous prime is 64665215969. The next prime is 64665216043. The reversal of 64665215982 is 28951256646.

64665215982 is a `hidden beast` number, since 6 + 4 + 66 + 521 + 59 + 8 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1796255982 + ... + 1796256017.

It is an arithmetic number, because the mean of its divisors is an integer number (11675664000).

Almost surely, 2^64665215982 is an apocalyptic number.

64665215982 is an abundant number, since it is smaller than the sum of its proper divisors (75442752018).

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

64665215982 is a wasteful number, since it uses less digits than its factorization.

64665215982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592512007 (or 3592512004 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 64665215982 in words is "sixty-four billion, six hundred sixty-five million, two hundred fifteen thousand, nine hundred eighty-two".