166364362513533 has 4 divisors (see below), whose sum is σ = 221819150018048. Its totient is φ = 110909575009020.

The previous prime is 166364362513507. The next prime is 166364362513627. The reversal of 166364362513533 is 335315263463661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166364362513533 - 2²⁶ = 166364295404669 is a prime.

It is a super-2 number, since 2×166364362513533² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166364362513133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27727393752253 + ... + 27727393752258.

It is an arithmetic number, because the mean of its divisors is an integer number (55454787504512).

Almost surely, 2^{166364362513533} is an apocalyptic number.

It is an amenable number.

166364362513533 is a deficient number, since it is larger than the sum of its proper divisors (55454787504515).

166364362513533 is an equidigital number, since it uses as much as digits as its factorization.

166364362513533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55454787504514.

The product of its digits is 62985600, while the sum is 57.

The spelling of 166364362513533 in words is "one hundred sixty-six trillion, three hundred sixty-four billion, three hundred sixty-two million, five hundred thirteen thousand, five hundred thirty-three".