667173053 has 4 divisors (see below), whose sum is σ = 667241820. Its totient is φ = 667104288.

The previous prime is 667172999. The next prime is 667173107. The reversal of 667173053 is 350371766.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 350371766 = 2 ⋅175185883.

It is an interprime number because it is at equal distance from previous prime (667172999) and next prime (667173107).

It can be written as a sum of positive squares in 2 ways, for example, as 468419449 + 198753604 = 21643^2 + 14098^2 .

It is a cyclic number.

It is not a de Polignac number, because 667173053 - 2⁸ = 667172797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667172998 and 667173016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667173253) 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, 16850 + ... + 40227.

It is an arithmetic number, because the mean of its divisors is an integer number (166810455).

Almost surely, 2^667173053 is an apocalyptic number.

It is an amenable number.

667173053 is a deficient number, since it is larger than the sum of its proper divisors (68767).

667173053 is a wasteful number, since it uses less digits than its factorization.

667173053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68766.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 667173053 is about 25829.6932424681. The cubic root of 667173053 is about 873.8015933617.

The spelling of 667173053 in words is "six hundred sixty-seven million, one hundred seventy-three thousand, fifty-three".