66717644012146 has 8 divisors (see below), whose sum is σ = 100076535664560. Its totient is φ = 33358798790628.

The previous prime is 66717644012029. The next prime is 66717644012147. The reversal of 66717644012146 is 64121044671766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66717644012147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7760376 + ... + 13916131.

It is an arithmetic number, because the mean of its divisors is an integer number (12509566958070).

Almost surely, 2^{66717644012146} is an apocalyptic number.

66717644012146 is a deficient number, since it is larger than the sum of its proper divisors (33358891652414).

66717644012146 is a wasteful number, since it uses less digits than its factorization.

66717644012146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23215448.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 66717644012146 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, one hundred forty-six".