66717644012246 has 16 divisors (see below), whose sum is σ = 105970801538880. Its totient is φ = 31394320705920.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012246 is 64221044671766.

It is a junction number, because it is equal to n+sod(n) for n = 66717644012191 and 66717644012200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68813165 + ... + 69775976.

It is an arithmetic number, because the mean of its divisors is an integer number (6623175096180).

Almost surely, 2^{66717644012246} is an apocalyptic number.

66717644012246 is a deficient number, since it is larger than the sum of its proper divisors (39253157526634).

66717644012246 is a wasteful number, since it uses less digits than its factorization.

66717644012246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138603319.

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 66717644012246 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, two hundred forty-six".