66377520688 has 40 divisors (see below), whose sum is σ = 130661605872. Its totient is φ = 32659427328.

The previous prime is 66377520617. The next prime is 66377520691. The reversal of 66377520688 is 88602577366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015656 + ... + 1079032.

Almost surely, 2^66377520688 is an apocalyptic number.

It is an amenable number.

66377520688 is a deficient number, since it is larger than the sum of its proper divisors (64284085184).

66377520688 is a wasteful number, since it uses less digits than its factorization.

66377520688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64429 (or 64423 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 66377520688 in words is "sixty-six billion, three hundred seventy-seven million, five hundred twenty thousand, six hundred eighty-eight".