10518661 has 2 divisors, whose sum is σ = 10518662. Its totient is φ = 10518660.

The previous prime is 10518653. The next prime is 10518671. The reversal of 10518661 is 16681501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 476100 = 3169^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 10518661 - 2³ = 10518653 is a prime.

It is a super-2 number, since 2×10518661² = 221284458465842, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10518601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5259330 + 5259331.

It is an arithmetic number, because the mean of its divisors is an integer number (5259331).

Almost surely, 2^10518661 is an apocalyptic number.

It is an amenable number.

10518661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10518661 is an equidigital number, since it uses as much as digits as its factorization.

10518661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 10518661 is about 3243.2485257840. The cubic root of 10518661 is about 219.1056043575.

It can be divided in two parts, 10 and 518661, that added together give a triangular number (518671 = T₁₀₁₈).

The spelling of 10518661 in words is "ten million, five hundred eighteen thousand, six hundred sixty-one".