660646106635 has 16 divisors (see below), whose sum is σ = 817133255136. Its totient is φ = 512457700608.

The previous prime is 660646106633. The next prime is 660646106639. The reversal of 660646106635 is 536601646066.

It is a cyclic number.

It is not a de Polignac number, because 660646106635 - 2¹ = 660646106633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660646106633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11185044 + ... + 11243953.

It is an arithmetic number, because the mean of its divisors is an integer number (51070828446).

Almost surely, 2^660646106635 is an apocalyptic number.

660646106635 is a deficient number, since it is larger than the sum of its proper divisors (156487148501).

660646106635 is a wasteful number, since it uses less digits than its factorization.

660646106635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22429182.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 660646106635 in words is "six hundred sixty billion, six hundred forty-six million, one hundred six thousand, six hundred thirty-five".