660396736679 has 2 divisors, whose sum is σ = 660396736680. Its totient is φ = 660396736678.

The previous prime is 660396736619. The next prime is 660396736729. The reversal of 660396736679 is 976637693066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660396736679 is a prime.

It is a super-2 number, since 2×660396736679² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660396736609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330198368339 + 330198368340.

It is an arithmetic number, because the mean of its divisors is an integer number (330198368340).

Almost surely, 2^660396736679 is an apocalyptic number.

660396736679 is a deficient number, since it is larger than the sum of its proper divisors (1).

660396736679 is an equidigital number, since it uses as much as digits as its factorization.

660396736679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277766496, while the sum is 68.

The spelling of 660396736679 in words is "six hundred sixty billion, three hundred ninety-six million, seven hundred thirty-six thousand, six hundred seventy-nine".