66747629540 has 24 divisors (see below), whose sum is σ = 144691636992. Its totient is φ = 25837791840.

The previous prime is 66747629521. The next prime is 66747629549. The reversal of 66747629540 is 4592674766.

It is a super-2 number, since 2×66747629540² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66747629549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53828114 + ... + 53829353.

It is an arithmetic number, because the mean of its divisors is an integer number (6028818208).

Almost surely, 2^66747629540 is an apocalyptic number.

It is an amenable number.

66747629540 is an abundant number, since it is smaller than the sum of its proper divisors (77944007452).

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

66747629540 is a wasteful number, since it uses less digits than its factorization.

66747629540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107657507 (or 107657505 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 66747629540 in words is "sixty-six billion, seven hundred forty-seven million, six hundred twenty-nine thousand, five hundred forty".