166355155533 has 8 divisors (see below), whose sum is σ = 253493570368. Its totient is φ = 95060088864.

The previous prime is 166355155493. The next prime is 166355155541. The reversal of 166355155533 is 335551553661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166355155533 - 2²⁴ = 166338378317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166355155543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3960837016 + ... + 3960837057.

It is an arithmetic number, because the mean of its divisors is an integer number (31686696296).

Almost surely, 2^166355155533 is an apocalyptic number.

It is an amenable number.

166355155533 is a deficient number, since it is larger than the sum of its proper divisors (87138414835).

166355155533 is an equidigital number, since it uses as much as digits as its factorization.

166355155533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921674083.

The product of its digits is 3037500, while the sum is 48.

The spelling of 166355155533 in words is "one hundred sixty-six billion, three hundred fifty-five million, one hundred fifty-five thousand, five hundred thirty-three".