660626513420507 has 16 divisors (see below), whose sum is σ = 677101918452960. Its totient is φ = 644202448710912.

The previous prime is 660626513420479. The next prime is 660626513420557. The reversal of 660626513420507 is 705024315626066.

It is a cyclic number.

It is not a de Polignac number, because 660626513420507 - 2³⁶ = 660557793943771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660626513420557) 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 15 ways as a sum of consecutive naturals, for example, 65093669 + ... + 74554937.

It is an arithmetic number, because the mean of its divisors is an integer number (42318869903310).

Almost surely, 2^{660626513420507} is an apocalyptic number.

660626513420507 is a deficient number, since it is larger than the sum of its proper divisors (16475405032453).

660626513420507 is a wasteful number, since it uses less digits than its factorization.

660626513420507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463982.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 660626513420507 in words is "six hundred sixty trillion, six hundred twenty-six billion, five hundred thirteen million, four hundred twenty thousand, five hundred seven".