10667621 has 4 divisors (see below), whose sum is σ = 11035500. Its totient is φ = 10299744.

The previous prime is 10667609. The next prime is 10667623. The reversal of 10667621 is 12676601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5313025 + 5354596 = 2305^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 10667621 - 2¹⁰ = 10666597 is a prime.

It is a super-2 number, since 2×10667621² = 227596275599282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 367849 = 10667621 / (1 + 0 + 6 + 6 + 7 + 6 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10667623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183896 + ... + 183953.

It is an arithmetic number, because the mean of its divisors is an integer number (2758875).

Almost surely, 2^10667621 is an apocalyptic number.

It is an amenable number.

10667621 is a deficient number, since it is larger than the sum of its proper divisors (367879).

10667621 is an equidigital number, since it uses as much as digits as its factorization.

10667621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367878.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 10667621 is about 3266.1324223001. The cubic root of 10667621 is about 220.1350479373.

The spelling of 10667621 in words is "ten million, six hundred sixty-seven thousand, six hundred twenty-one".