66318967554 has 64 divisors (see below), whose sum is σ = 160292708352. Its totient is φ = 17889782400.

The previous prime is 66318967549. The next prime is 66318967577. The reversal of 66318967554 is 45576981366.

It is a super-3 number, since 3×66318967554³ (a number of 33 digits) contains 333 as substring.

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 31 ways as a sum of consecutive naturals, for example, 567792 + ... + 674555.

It is an arithmetic number, because the mean of its divisors is an integer number (2504573568).

Almost surely, 2^66318967554 is an apocalyptic number.

66318967554 is an abundant number, since it is smaller than the sum of its proper divisors (93973740798).

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

66318967554 is a wasteful number, since it uses less digits than its factorization.

66318967554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242431.

The product of its digits is 32659200, while the sum is 60.

The spelling of 66318967554 in words is "sixty-six billion, three hundred eighteen million, nine hundred sixty-seven thousand, five hundred fifty-four".