53121666607 has 2 divisors, whose sum is σ = 53121666608. Its totient is φ = 53121666606.

The previous prime is 53121666601. The next prime is 53121666649. The reversal of 53121666607 is 70666612135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53121666607 - 2¹⁵ = 53121633839 is a prime.

It is a super-2 number, since 2×53121666607² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53121666601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560833303 + 26560833304.

It is an arithmetic number, because the mean of its divisors is an integer number (26560833304).

Almost surely, 2^53121666607 is an apocalyptic number.

53121666607 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121666607 is an equidigital number, since it uses as much as digits as its factorization.

53121666607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 53121666607 in words is "fifty-three billion, one hundred twenty-one million, six hundred sixty-six thousand, six hundred seven".