66542679120 has 80 divisors (see below), whose sum is σ = 206319687552. Its totient is φ = 17741498880.

The previous prime is 66542679113. The next prime is 66542679139. The reversal of 66542679120 is 2197624566.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 66542679120.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1492674 + ... + 1536606.

Almost surely, 2^66542679120 is an apocalyptic number.

66542679120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66542679120 is an abundant number, since it is smaller than the sum of its proper divisors (139777008432).

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

66542679120 is a wasteful number, since it uses less digits than its factorization.

66542679120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50260 (or 50254 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 66542679120 in words is "sixty-six billion, five hundred forty-two million, six hundred seventy-nine thousand, one hundred twenty".