6670370521 has 2 divisors, whose sum is σ = 6670370522. Its totient is φ = 6670370520.

The previous prime is 6670370453. The next prime is 6670370561. The reversal of 6670370521 is 1250730766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3462734025 + 3207636496 = 58845^2 + 56636^2 .

It is a cyclic number.

It is not a de Polignac number, because 6670370521 - 2¹⁷ = 6670239449 is a prime.

It is a super-2 number, since 2×6670370521² = 88987685774851622882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6670370561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335185260 + 3335185261.

It is an arithmetic number, because the mean of its divisors is an integer number (3335185261).

Almost surely, 2^6670370521 is an apocalyptic number.

It is an amenable number.

6670370521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6670370521 is an equidigital number, since it uses as much as digits as its factorization.

6670370521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 6670370521 is about 81672.3363263229. The cubic root of 6670370521 is about 1882.4205392711.

The spelling of 6670370521 in words is "six billion, six hundred seventy million, three hundred seventy thousand, five hundred twenty-one".