53176661 has 4 divisors (see below), whose sum is σ = 53724972. Its totient is φ = 52628352.

The previous prime is 53176639. The next prime is 53176703. The reversal of 53176661 is 16667135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16667135 = 5 ⋅3333427.

It can be written as a sum of positive squares in 2 ways, for example, as 28026436 + 25150225 = 5294^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 53176661 - 2⁶ = 53176597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53176061) 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, 274010 + ... + 274203.

It is an arithmetic number, because the mean of its divisors is an integer number (13431243).

Almost surely, 2^53176661 is an apocalyptic number.

It is an amenable number.

53176661 is a deficient number, since it is larger than the sum of its proper divisors (548311).

53176661 is an equidigital number, since it uses as much as digits as its factorization.

53176661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548310.

The product of its digits is 22680, while the sum is 35.

The square root of 53176661 is about 7292.2329227748. The cubic root of 53176661 is about 376.0454642663.

The spelling of 53176661 in words is "fifty-three million, one hundred seventy-six thousand, six hundred sixty-one".