166437274153253 has 2 divisors, whose sum is σ = 166437274153254. Its totient is φ = 166437274153252.

The previous prime is 166437274153247. The next prime is 166437274153289. The reversal of 166437274153253 is 352351472734661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116221810706884 + 50215463446369 = 10780622^2 + 7086287^2 .

It is an emirp because it is prime and its reverse (352351472734661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166437274153253 - 2⁴ = 166437274153237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166437274153192 and 166437274153201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166437274159253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83218637076626 + 83218637076627.

It is an arithmetic number, because the mean of its divisors is an integer number (83218637076627).

Almost surely, 2^{166437274153253} is an apocalyptic number.

It is an amenable number.

166437274153253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166437274153253 is an equidigital number, since it uses as much as digits as its factorization.

166437274153253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 59.

The spelling of 166437274153253 in words is "one hundred sixty-six trillion, four hundred thirty-seven billion, two hundred seventy-four million, one hundred fifty-three thousand, two hundred fifty-three".