66745408044782 has 4 divisors (see below), whose sum is σ = 100118112067176. Its totient is φ = 33372704022390.

The previous prime is 66745408044781. The next prime is 66745408044793. The reversal of 66745408044782 is 28744080454766.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66745408044781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16686352011194 + ... + 16686352011197.

It is an arithmetic number, because the mean of its divisors is an integer number (25029528016794).

Almost surely, 2^{66745408044782} is an apocalyptic number.

66745408044782 is a deficient number, since it is larger than the sum of its proper divisors (33372704022394).

66745408044782 is a wasteful number, since it uses less digits than its factorization.

66745408044782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33372704022393.

The product of its (nonzero) digits is 289013760, while the sum is 65.

The spelling of 66745408044782 in words is "sixty-six trillion, seven hundred forty-five billion, four hundred eight million, forty-four thousand, seven hundred eighty-two".