66717644012224 has 14 divisors (see below), whose sum is σ = 132392824836884. Its totient is φ = 33358822006080.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012224 is 42221044671766.

It is a super-2 number, since 2×66717644012224² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521231593782 + ... + 521231593909.

Almost surely, 2^{66717644012224} is an apocalyptic number.

66717644012224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66717644012224 is a deficient number, since it is larger than the sum of its proper divisors (65675180824660).

66717644012224 is a wasteful number, since it uses less digits than its factorization.

66717644012224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042463187703 (or 1042463187693 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 52.

The spelling of 66717644012224 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, two hundred twenty-four".