6606213657 has 16 divisors (see below), whose sum is σ = 8962591680. Its totient is φ = 4327072832.

The previous prime is 6606213637. The next prime is 6606213689. The reversal of 6606213657 is 7563126066.

6606213657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6606213657 - 2⁷ = 6606213529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6606213637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339763 + ... + 358679.

It is an arithmetic number, because the mean of its divisors is an integer number (560161980).

Almost surely, 2^6606213657 is an apocalyptic number.

It is an amenable number.

6606213657 is a deficient number, since it is larger than the sum of its proper divisors (2356378023).

6606213657 is a wasteful number, since it uses less digits than its factorization.

6606213657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20952.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 6606213657 is about 81278.6174648659. The cubic root of 6606213657 is about 1876.3659292005.

The spelling of 6606213657 in words is "six billion, six hundred six million, two hundred thirteen thousand, six hundred fifty-seven".