670500521 has 4 divisors (see below), whose sum is σ = 670731600. Its totient is φ = 670269444.

The previous prime is 670500497. The next prime is 670500539. The reversal of 670500521 is 125005076.

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.

It is a cyclic number.

It is not a de Polignac number, because 670500521 - 2¹⁰ = 670499497 is a prime.

It is a super-2 number, since 2×670500521² = 899141897322542882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670500541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111131 + ... + 117008.

It is an arithmetic number, because the mean of its divisors is an integer number (167682900).

Almost surely, 2^670500521 is an apocalyptic number.

It is an amenable number.

670500521 is a deficient number, since it is larger than the sum of its proper divisors (231079).

670500521 is a wasteful number, since it uses less digits than its factorization.

670500521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231078.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 670500521 is about 25894.0248126860. The cubic root of 670500521 is about 875.2518550107.

Adding to 670500521 its reverse (125005076), we get a palindrome (795505597).

The spelling of 670500521 in words is "six hundred seventy million, five hundred thousand, five hundred twenty-one".