667501523252565 has 48 divisors (see below), whose sum is σ = 1134533333179008. Its totient is φ = 335056128922624.

The previous prime is 667501523252563. The next prime is 667501523252567. The reversal of 667501523252565 is 565252325105766.

It is an interprime number because it is at equal distance from previous prime (667501523252563) and next prime (667501523252567).

It is not a de Polignac number, because 667501523252565 - 2¹ = 667501523252563 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667501523252499 and 667501523252508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667501523252563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448419304 + ... + 449905406.

It is an arithmetic number, because the mean of its divisors is an integer number (23636111107896).

Almost surely, 2^{667501523252565} is an apocalyptic number.

It is an amenable number.

667501523252565 is a deficient number, since it is larger than the sum of its proper divisors (467031809926443).

667501523252565 is a wasteful number, since it uses less digits than its factorization.

667501523252565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589758 (or 1589741 counting only the distinct ones).

The product of its (nonzero) digits is 113400000, while the sum is 60.

The spelling of 667501523252565 in words is "six hundred sixty-seven trillion, five hundred one billion, five hundred twenty-three million, two hundred fifty-two thousand, five hundred sixty-five".