11665674405025 has 27 divisors (see below), whose sum is σ = 14827747004779. Its totient is φ = 9104370128000.

The previous prime is 11665674405019. The next prime is 11665674405031. The reversal of 11665674405025 is 52050447656611.

The square root of 11665674405025 is 3415505.

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

It is an interprime number because it is at equal distance from previous prime (11665674405019) and next prime (11665674405031).

It can be written as a sum of positive squares in 13 ways, for example, as 11609781879969 + 55892525056 = 3407313^2 + 236416^2 .

It is not a de Polignac number, because 11665674405025 - 2³ = 11665674405017 is a prime.

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, 700170195 + ... + 700186855.

Almost surely, 2^{11665674405025} is an apocalyptic number.

11665674405025 is the 3415505-th square number.

11665674405025 is the 1707753-rd centered octagonal number.

It is an amenable number.

11665674405025 is a deficient number, since it is larger than the sum of its proper divisors (3162072599754).

11665674405025 is an frugal number, since it uses more digits than its factorization.

11665674405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33414 (or 16707 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 11665674405025 in words is "eleven trillion, six hundred sixty-five billion, six hundred seventy-four million, four hundred five thousand, twenty-five".