667157553 has 20 divisors (see below), whose sum is σ = 997367668. Its totient is φ = 444437280.

The previous prime is 667157539. The next prime is 667157563. The reversal of 667157553 is 355751766.

667157553 is a `hidden beast` number, since 6 + 6 + 71 + 575 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 569681424 + 97476129 = 23868^2 + 9873^2 .

It is not a de Polignac number, because 667157553 - 2⁶ = 667157489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667157499 and 667157508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667157563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154443 + ... + 158703.

Almost surely, 2^667157553 is an apocalyptic number.

It is an amenable number.

667157553 is a deficient number, since it is larger than the sum of its proper divisors (330210115).

667157553 is a wasteful number, since it uses less digits than its factorization.

667157553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206 (or 6197 counting only the distinct ones).

The product of its digits is 661500, while the sum is 45.

The square root of 667157553 is about 25829.3931984474. The cubic root of 667157553 is about 873.7948264869.

The spelling of 667157553 in words is "six hundred sixty-seven million, one hundred fifty-seven thousand, five hundred fifty-three".