660956146623 has 18 divisors (see below), whose sum is σ = 973067828096. Its totient is φ = 432323500752.

The previous prime is 660956146619. The next prime is 660956146663. The reversal of 660956146623 is 326641659066.

660956146623 is a `hidden beast` number, since 6 + 6 + 0 + 9 + 5 + 6 + 1 + 4 + 6 + 623 = 666.

It is not a de Polignac number, because 660956146623 - 2² = 660956146619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660956146623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660956146663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13046911 + ... + 13097472.

Almost surely, 2^660956146623 is an apocalyptic number.

660956146623 is a deficient number, since it is larger than the sum of its proper divisors (312111681473).

660956146623 is a wasteful number, since it uses less digits than its factorization.

660956146623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26144495 (or 26144439 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 660956146623 in words is "six hundred sixty billion, nine hundred fifty-six million, one hundred forty-six thousand, six hundred twenty-three".