6647914506025 has 27 divisors (see below), whose sum is σ = 8926525389861. Its totient is φ = 4909105412640.

The previous prime is 6647914506011. The next prime is 6647914506053. The reversal of 6647914506025 is 5206054197466.

The square root of 6647914506025 is 2578355.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1713509798121 + 4934404707904 = 1309011^2 + 2221352^2 .

It is not a de Polignac number, because 6647914506025 - 2⁵ = 6647914505993 is a prime.

It is a super-2 number, since 2×6647914506025² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 167573242 + ... + 167612908.

Almost surely, 2^{6647914506025} is an apocalyptic number.

6647914506025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6647914506025 is the 2578355-th square number.

6647914506025 is the 1289178-th centered octagonal number.

It is an amenable number.

6647914506025 is a deficient number, since it is larger than the sum of its proper divisors (2278610883836).

6647914506025 is an frugal number, since it uses more digits than its factorization.

6647914506025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79370 (or 39685 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 6647914506025 in words is "six trillion, six hundred forty-seven billion, nine hundred fourteen million, five hundred six thousand, twenty-five".