266691047 has 16 divisors (see below), whose sum is σ = 325478400. Its totient is φ = 213585120.

The previous prime is 266691041. The next prime is 266691083. The reversal of 266691047 is 740196662.

It is not a de Polignac number, because 266691047 - 2¹⁶ = 266625511 is a prime.

It is a super-2 number, since 2×266691047² = 142248229099912418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266690995 and 266691013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266691041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14897 + ... + 27482.

It is an arithmetic number, because the mean of its divisors is an integer number (20342400).

Almost surely, 2^266691047 is an apocalyptic number.

266691047 is a deficient number, since it is larger than the sum of its proper divisors (58787353).

266691047 is a wasteful number, since it uses less digits than its factorization.

266691047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42446.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 266691047 is about 16330.6780936984. The cubic root of 266691047 is about 643.6792049335.

The spelling of 266691047 in words is "two hundred sixty-six million, six hundred ninety-one thousand, forty-seven".