667163553 has 16 divisors (see below), whose sum is σ = 1060832256. Its totient is φ = 364660560.

The previous prime is 667163551. The next prime is 667163591. The reversal of 667163553 is 355361766.

It is a happy number.

It is not a de Polignac number, because 667163553 - 2¹ = 667163551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667163551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690163 + ... + 691128.

It is an arithmetic number, because the mean of its divisors is an integer number (66302016).

Almost surely, 2^667163553 is an apocalyptic number.

It is an amenable number.

667163553 is a deficient number, since it is larger than the sum of its proper divisors (393668703).

667163553 is a wasteful number, since it uses less digits than its factorization.

667163553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381324.

The product of its digits is 340200, while the sum is 42.

The square root of 667163553 is about 25829.5093449334. The cubic root of 667163553 is about 873.7974459347.

The spelling of 667163553 in words is "six hundred sixty-seven million, one hundred sixty-three thousand, five hundred fifty-three".