10720657 has 4 divisors (see below), whose sum is σ = 10727280. Its totient is φ = 10714036.

The previous prime is 10720627. The next prime is 10720663. The reversal of 10720657 is 75602701.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75602701 = 8677 ⋅8713.

It is a cyclic number.

It is not a de Polignac number, because 10720657 - 2¹⁵ = 10687889 is a prime.

It is a super-2 number, since 2×10720657² = 229864973023298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10720627) 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, 918 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (2681820).

Almost surely, 2^10720657 is an apocalyptic number.

It is an amenable number.

10720657 is a deficient number, since it is larger than the sum of its proper divisors (6623).

10720657 is an equidigital number, since it uses as much as digits as its factorization.

10720657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 10720657 is about 3274.2414388679. The cubic root of 10720657 is about 220.4992587083.

The spelling of 10720657 in words is "ten million, seven hundred twenty thousand, six hundred fifty-seven".