66727137040 has 80 divisors (see below), whose sum is σ = 163905223680. Its totient is φ = 25222131200.

The previous prime is 66727137007. The next prime is 66727137041. The reversal of 66727137040 is 4073172766.

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

It is not an unprimeable number, because it can be changed into a prime (66727137041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 196936 + ... + 415015.

It is an arithmetic number, because the mean of its divisors is an integer number (2048815296).

Almost surely, 2^66727137040 is an apocalyptic number.

It is an amenable number.

66727137040 is an abundant number, since it is smaller than the sum of its proper divisors (97178086640).

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

66727137040 is a wasteful number, since it uses less digits than its factorization.

66727137040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612040 (or 612034 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 66727137040 in words is "sixty-six billion, seven hundred twenty-seven million, one hundred thirty-seven thousand, forty".