6643958593466 has 32 divisors (see below), whose sum is σ = 10037143296000. Its totient is φ = 3298314539520.

The previous prime is 6643958593463. The next prime is 6643958593477.

6643958593466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6643958593393 and 6643958593402.

It is not an unprimeable number, because it can be changed into a prime (6643958593463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 956099360 + ... + 956106308.

It is an arithmetic number, because the mean of its divisors is an integer number (313660728000).

Almost surely, 2^{6643958593466} is an apocalyptic number.

6643958593466 is a deficient number, since it is larger than the sum of its proper divisors (3393184702534).

6643958593466 is a wasteful number, since it uses less digits than its factorization.

6643958593466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11534.

The product of its digits is 3023308800, while the sum is 74.

The spelling of 6643958593466 in words is "six trillion, six hundred forty-three billion, nine hundred fifty-eight million, five hundred ninety-three thousand, four hundred sixty-six".