66511644614 has 8 divisors (see below), whose sum is σ = 100030706760. Its totient is φ = 33168075696.

The previous prime is 66511644547. The next prime is 66511644659. The reversal of 66511644614 is 41644611566.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43872359 + ... + 43873874.

It is an arithmetic number, because the mean of its divisors is an integer number (12503838345).

Almost surely, 2^66511644614 is an apocalyptic number.

66511644614 is a deficient number, since it is larger than the sum of its proper divisors (33519062146).

66511644614 is a wasteful number, since it uses less digits than its factorization.

66511644614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87746614.

The product of its digits is 414720, while the sum is 44.

The spelling of 66511644614 in words is "sixty-six billion, five hundred eleven million, six hundred forty-four thousand, six hundred fourteen".