66659977614 has 16 divisors (see below), whose sum is σ = 133322682240. Its totient is φ = 22219538040.

The previous prime is 66659977607. The next prime is 66659977627. The reversal of 66659977614 is 41677995666.

It is a happy number.

It is a super-2 number, since 2×66659977614² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349117 + ... + 505175.

It is an arithmetic number, because the mean of its divisors is an integer number (8332667640).

Almost surely, 2^66659977614 is an apocalyptic number.

66659977614 is an abundant number, since it is smaller than the sum of its proper divisors (66662704626).

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

66659977614 is a wasteful number, since it uses less digits than its factorization.

66659977614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227255.

The product of its digits is 102876480, while the sum is 66.

The spelling of 66659977614 in words is "sixty-six billion, six hundred fifty-nine million, nine hundred seventy-seven thousand, six hundred fourteen".