8520667 has 4 divisors (see below), whose sum is σ = 8528416. Its totient is φ = 8512920.

The previous prime is 8520653. The next prime is 8520679. The reversal of 8520667 is 7660258.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8520667 - 2¹¹ = 8518619 is a prime.

It is a super-2 number, since 2×8520667² = 145203532249778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8520647) 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, 1884 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (2132104).

Almost surely, 2^8520667 is an apocalyptic number.

8520667 is a deficient number, since it is larger than the sum of its proper divisors (7749).

8520667 is a wasteful number, since it uses less digits than its factorization.

8520667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7748.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 8520667 is about 2919.0181568466. The cubic root of 8520667 is about 204.2480242929.

The spelling of 8520667 in words is "eight million, five hundred twenty thousand, six hundred sixty-seven".