66726733336 has 8 divisors (see below), whose sum is σ = 125112625020. Its totient is φ = 33363366664.

The previous prime is 66726733319. The next prime is 66726733343. The reversal of 66726733336 is 63333762766.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170420826 + ... + 4170420841.

Almost surely, 2^66726733336 is an apocalyptic number.

It is an amenable number.

66726733336 is a deficient number, since it is larger than the sum of its proper divisors (58385891684).

66726733336 is a wasteful number, since it uses less digits than its factorization.

66726733336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340841673 (or 8340841669 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 52.

The spelling of 66726733336 in words is "sixty-six billion, seven hundred twenty-six million, seven hundred thirty-three thousand, three hundred thirty-six".