10166261 has 4 divisors (see below), whose sum is σ = 11618592. Its totient is φ = 8713932.

The previous prime is 10166251. The next prime is 10166263. The reversal of 10166261 is 16266101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16266101 = 239 ⋅68059.

It is a cyclic number.

It is not a de Polignac number, because 10166261 - 2¹⁰ = 10165237 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 (10166263) 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, 726155 + ... + 726168.

It is an arithmetic number, because the mean of its divisors is an integer number (2904648).

Almost surely, 2^10166261 is an apocalyptic number.

It is an amenable number.

10166261 is a deficient number, since it is larger than the sum of its proper divisors (1452331).

10166261 is an equidigital number, since it uses as much as digits as its factorization.

10166261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452330.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10166261 is about 3188.4574640412. The cubic root of 10166261 is about 216.6309071819.

The spelling of 10166261 in words is "ten million, one hundred sixty-six thousand, two hundred sixty-one".