66740740734 has 16 divisors (see below), whose sum is σ = 133491769488. Its totient is φ = 22245198912.

The previous prime is 66740740723. The next prime is 66740740739. The reversal of 66740740734 is 43704704766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740740739) 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, 343017 + ... + 501140.

It is an arithmetic number, because the mean of its divisors is an integer number (8343235593).

Almost surely, 2^66740740734 is an apocalyptic number.

66740740734 is an abundant number, since it is smaller than the sum of its proper divisors (66751028754).

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

66740740734 is a wasteful number, since it uses less digits than its factorization.

66740740734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857339.

The product of its (nonzero) digits is 2370816, while the sum is 48.

It can be divided in two parts, 6 and 6740740734, that multiplied together give a palindrome (40444444404).

The spelling of 66740740734 in words is "sixty-six billion, seven hundred forty million, seven hundred forty thousand, seven hundred thirty-four".