266430641 has 4 divisors (see below), whose sum is σ = 266577984. Its totient is φ = 266283300.

The previous prime is 266430617. The next prime is 266430649. The reversal of 266430641 is 146034662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266430641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266430598 and 266430607.

It is not an unprimeable number, because it can be changed into a prime (266430649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70925 + ... + 74586.

It is an arithmetic number, because the mean of its divisors is an integer number (66644496).

Almost surely, 2^266430641 is an apocalyptic number.

It is an amenable number.

266430641 is a deficient number, since it is larger than the sum of its proper divisors (147343).

266430641 is a wasteful number, since it uses less digits than its factorization.

266430641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147342.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 266430641 is about 16322.7032381282. The cubic root of 266430641 is about 643.4696334531.

The spelling of 266430641 in words is "two hundred sixty-six million, four hundred thirty thousand, six hundred forty-one".