66734672740 has 24 divisors (see below), whose sum is σ = 140158945080. Its totient is φ = 26690796288.

The previous prime is 66734672737. The next prime is 66734672783. The reversal of 66734672740 is 4727643766.

66734672740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2207496256 + 64527176484 = 46984^2 + 254022^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9745 + ... + 365464.

It is an arithmetic number, because the mean of its divisors is an integer number (5839956045).

Almost surely, 2^66734672740 is an apocalyptic number.

It is an amenable number.

66734672740 is an abundant number, since it is smaller than the sum of its proper divisors (73424272340).

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

66734672740 is a wasteful number, since it uses less digits than its factorization.

66734672740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384111 (or 384109 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 52.

The spelling of 66734672740 in words is "sixty-six billion, seven hundred thirty-four million, six hundred seventy-two thousand, seven hundred forty".