66648599976 has 32 divisors (see below), whose sum is σ = 190424571840. Its totient is φ = 19042457088.

The previous prime is 66648599923. The next prime is 66648600047. The reversal of 66648599976 is 67999584666.

It is a junction number, because it is equal to n+sod(n) for n = 66648599898 and 66648599907.

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, 198358761 + ... + 198359096.

It is an arithmetic number, because the mean of its divisors is an integer number (5950767870).

Almost surely, 2^66648599976 is an apocalyptic number.

It is an amenable number.

66648599976 is an abundant number, since it is smaller than the sum of its proper divisors (123775971864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66648599976 is a wasteful number, since it uses less digits than its factorization.

66648599976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396717873 (or 396717869 counting only the distinct ones).

The product of its digits is 1058158080, while the sum is 75.

The spelling of 66648599976 in words is "sixty-six billion, six hundred forty-eight million, five hundred ninety-nine thousand, nine hundred seventy-six".