6664526 has 16 divisors (see below), whose sum is σ = 11380608. Its totient is φ = 2897400.

The previous prime is 6664523. The next prime is 6664529. The reversal of 6664526 is 6254666.

It is an interprime number because it is at equal distance from previous prime (6664523) and next prime (6664529).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6080 + ... + 7091.

It is an arithmetic number, because the mean of its divisors is an integer number (711288).

Almost surely, 2^6664526 is an apocalyptic number.

6664526 is a deficient number, since it is larger than the sum of its proper divisors (4716082).

6664526 is a wasteful number, since it uses less digits than its factorization.

6664526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13207.

The product of its digits is 51840, while the sum is 35.

The square root of 6664526 is about 2581.5743258717. The cubic root of 6664526 is about 188.1870591751.

The spelling of 6664526 in words is "six million, six hundred sixty-four thousand, five hundred twenty-six".