166535642252053 has 32 divisors (see below), whose sum is σ = 169404361850880. Its totient is φ = 163696305447360.

The previous prime is 166535642252011. The next prime is 166535642252141. The reversal of 166535642252053 is 350252246535661.

166535642252053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166535642252053 - 2³⁷ = 166398203298581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166535642251985 and 166535642252003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166535642252653) 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, 10633773043 + ... + 10633788703.

It is an arithmetic number, because the mean of its divisors is an integer number (5293886307840).

Almost surely, 2^{166535642252053} is an apocalyptic number.

It is an amenable number.

166535642252053 is a deficient number, since it is larger than the sum of its proper divisors (2868719598827).

166535642252053 is a wasteful number, since it uses less digits than its factorization.

166535642252053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17377.

The product of its (nonzero) digits is 38880000, while the sum is 55.

The spelling of 166535642252053 in words is "one hundred sixty-six trillion, five hundred thirty-five billion, six hundred forty-two million, two hundred fifty-two thousand, fifty-three".