667501377625213 has 8 divisors (see below), whose sum is σ = 683785143228600. Its totient is φ = 651217766507520.

The previous prime is 667501377625153. The next prime is 667501377625217. The reversal of 667501377625213 is 312526773105766.

It can be written as a sum of positive squares in 4 ways, for example, as 26549977212889 + 640951400412324 = 5152667^2 + 25317018^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667501377625213 - 2²¹ = 667501375528061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667501377625217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29850420 + ... + 47181037.

It is an arithmetic number, because the mean of its divisors is an integer number (85473142903575).

Almost surely, 2^{667501377625213} is an apocalyptic number.

It is an amenable number.

667501377625213 is a deficient number, since it is larger than the sum of its proper divisors (16283765603387).

667501377625213 is a wasteful number, since it uses less digits than its factorization.

667501377625213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77242847.

The product of its (nonzero) digits is 66679200, while the sum is 61.

The spelling of 667501377625213 in words is "six hundred sixty-seven trillion, five hundred one billion, three hundred seventy-seven million, six hundred twenty-five thousand, two hundred thirteen".