266146641 has 20 divisors (see below), whose sum is σ = 398016432. Its totient is φ = 177235128.

The previous prime is 266146637. The next prime is 266146667. The reversal of 266146641 is 146641662.

266146641 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 4 + 6 + 641 = 666.

It is not a de Polignac number, because 266146641 - 2² = 266146637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266146596 and 266146605.

It is not an unprimeable number, because it can be changed into a prime (266146691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 138610 + ... + 140516.

Almost surely, 2^266146641 is an apocalyptic number.

It is an amenable number.

266146641 is a deficient number, since it is larger than the sum of its proper divisors (131869791).

266146641 is a wasteful number, since it uses less digits than its factorization.

266146641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3633 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 266146641 is about 16314.0013791835. The cubic root of 266146641 is about 643.2409180850.

The spelling of 266146641 in words is "two hundred sixty-six million, one hundred forty-six thousand, six hundred forty-one".