667740336420516 has 24 divisors (see below), whose sum is σ = 1562237891653824. Its totient is φ = 221983382615520.

The previous prime is 667740336420511. The next prime is 667740336420557. The reversal of 667740336420516 is 615024633047766.

It is a self number, because there is not a number n which added to its sum of digits gives 667740336420516.

It is not an unprimeable number, because it can be changed into a prime (667740336420511) 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, 74591185920 + ... + 74591194871.

It is an arithmetic number, because the mean of its divisors is an integer number (65093245485576).

Almost surely, 2^{667740336420516} is an apocalyptic number.

It is an amenable number.

667740336420516 is an abundant number, since it is smaller than the sum of its proper divisors (894497555233308).

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

667740336420516 is a wasteful number, since it uses less digits than its factorization.

667740336420516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149182381171 (or 149182381169 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 60.

The spelling of 667740336420516 in words is "six hundred sixty-seven trillion, seven hundred forty billion, three hundred thirty-six million, four hundred twenty thousand, five hundred sixteen".