667705220053 has 4 divisors (see below), whose sum is σ = 667759075308. Its totient is φ = 667651364800.

The previous prime is 667705219969. The next prime is 667705220099. The reversal of 667705220053 is 350022507766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350022507766 = 2 ⋅175011253883.

It can be written as a sum of positive squares in 2 ways, for example, as 350058005649 + 317647214404 = 591657^2 + 563602^2 .

It is a cyclic number.

It is not a de Polignac number, because 667705220053 - 2²⁵ = 667671665621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667705219991 and 667705220009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667705220653) 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 3 ways as a sum of consecutive naturals, for example, 26909026 + ... + 26933827.

It is an arithmetic number, because the mean of its divisors is an integer number (166939768827).

Almost surely, 2^667705220053 is an apocalyptic number.

It is an amenable number.

667705220053 is a deficient number, since it is larger than the sum of its proper divisors (53855255).

667705220053 is a wasteful number, since it uses less digits than its factorization.

667705220053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53855254.

The product of its (nonzero) digits is 529200, while the sum is 43.

The spelling of 667705220053 in words is "six hundred sixty-seven billion, seven hundred five million, two hundred twenty thousand, fifty-three".