172668553 has 8 divisors (see below), whose sum is σ = 176761728. Its totient is φ = 168592944.

The previous prime is 172668533. The next prime is 172668571. The reversal of 172668553 is 355866271.

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

It is a cyclic number.

It is not a de Polignac number, because 172668553 - 2¹⁷ = 172537481 is a prime.

It is a super-2 number, since 2×172668553² = 59628858390227618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172668533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (22095216).

Almost surely, 2^172668553 is an apocalyptic number.

It is an amenable number.

172668553 is a deficient number, since it is larger than the sum of its proper divisors (4093175).

172668553 is an equidigital number, since it uses as much as digits as its factorization.

172668553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8783.

The product of its digits is 302400, while the sum is 43.

The square root of 172668553 is about 13140.3406729049. The cubic root of 172668553 is about 556.8493920480.

The spelling of 172668553 in words is "one hundred seventy-two million, six hundred sixty-eight thousand, five hundred fifty-three".