667367760121625 has 8 divisors (see below), whose sum is σ = 832874964631944. Its totient is φ = 533894208097200.

The previous prime is 667367760121613. The next prime is 667367760121639. The reversal of 667367760121625 is 526121067763766.

It can be written as a sum of positive squares in 4 ways, for example, as 4013944131289 + 663353815990336 = 2003483^2 + 25755656^2 .

It is not a de Polignac number, because 667367760121625 - 2⁴⁰ = 666268248493849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669471040362 + ... + 2669471040611.

It is an arithmetic number, because the mean of its divisors is an integer number (104109370578993).

Almost surely, 2^{667367760121625} is an apocalyptic number.

It is an amenable number.

667367760121625 is a deficient number, since it is larger than the sum of its proper divisors (165507204510319).

667367760121625 is an equidigital number, since it uses as much as digits as its factorization.

667367760121625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338942080988 (or 5338942080978 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 65.

The spelling of 667367760121625 in words is "six hundred sixty-seven trillion, three hundred sixty-seven billion, seven hundred sixty million, one hundred twenty-one thousand, six hundred twenty-five".