64947666674946 has 96 divisors (see below), whose sum is σ = 144635413708800. Its totient is φ = 19425184178400.

The previous prime is 64947666674911. The next prime is 64947666674959.

64947666674946 is nontrivially palindromic in base 10.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164925501 + ... + 165318831.

It is an arithmetic number, because the mean of its divisors is an integer number (1506618892800).

Almost surely, 2^{64947666674946} is an apocalyptic number.

64947666674946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64947666674946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72317706854400).

64947666674946 is an abundant number, since it is smaller than the sum of its proper divisors (79687747033854).

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

64947666674946 is a wasteful number, since it uses less digits than its factorization.

64947666674946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396316 (or 396305 counting only the distinct ones).

The product of its digits is 47405481984, while the sum is 84.

The spelling of 64947666674946 in words is "sixty-four trillion, nine hundred forty-seven billion, six hundred sixty-six million, six hundred seventy-four thousand, nine hundred forty-six".