14557661 has 4 divisors (see below), whose sum is σ = 15414012. Its totient is φ = 13701312.

The previous prime is 14557657. The next prime is 14557721. The reversal of 14557661 is 16675541.

14557661 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16675541 = 211 ⋅79031.

It can be written as a sum of positive squares in 2 ways, for example, as 7896100 + 6661561 = 2810^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 14557661 - 2² = 14557657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14557651) 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, 428150 + ... + 428183.

It is an arithmetic number, because the mean of its divisors is an integer number (3853503).

Almost surely, 2^14557661 is an apocalyptic number.

It is an amenable number.

14557661 is a deficient number, since it is larger than the sum of its proper divisors (856351).

14557661 is an equidigital number, since it uses as much as digits as its factorization.

14557661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856350.

The product of its digits is 25200, while the sum is 35.

The square root of 14557661 is about 3815.4503010785. The cubic root of 14557661 is about 244.1727534557.

The spelling of 14557661 in words is "fourteen million, five hundred fifty-seven thousand, six hundred sixty-one".