166436505245253 has 32 divisors (see below), whose sum is σ = 226545283094400. Its totient is φ = 108662166429696.

The previous prime is 166436505245249. The next prime is 166436505245359. The reversal of 166436505245253 is 352542505634661.

It is not a de Polignac number, because 166436505245253 - 2² = 166436505245249 is a prime.

It is a super-2 number, since 2×166436505245253² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166436505245193 and 166436505245202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166436505245243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518965813 + ... + 519286421.

It is an arithmetic number, because the mean of its divisors is an integer number (7079540096700).

Almost surely, 2^{166436505245253} is an apocalyptic number.

It is an amenable number.

166436505245253 is a deficient number, since it is larger than the sum of its proper divisors (60108777849147).

166436505245253 is a wasteful number, since it uses less digits than its factorization.

166436505245253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335781.

The product of its (nonzero) digits is 77760000, while the sum is 57.

The spelling of 166436505245253 in words is "one hundred sixty-six trillion, four hundred thirty-six billion, five hundred five million, two hundred forty-five thousand, two hundred fifty-three".