26667961 has 2 divisors, whose sum is σ = 26667962. Its totient is φ = 26667960.

The previous prime is 26667947. The next prime is 26667973. The reversal of 26667961 is 16976662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 11799225 = 3856^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 26667961 - 2⁹ = 26667449 is a prime.

It is a super-2 number, since 2×26667961² = 1422360287795042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26667911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13333980 + 13333981.

It is an arithmetic number, because the mean of its divisors is an integer number (13333981).

Almost surely, 2^26667961 is an apocalyptic number.

It is an amenable number.

26667961 is a deficient number, since it is larger than the sum of its proper divisors (1).

26667961 is an equidigital number, since it uses as much as digits as its factorization.

26667961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 26667961 is about 5164.1031167087. The cubic root of 26667961 is about 298.7651500519.

The spelling of 26667961 in words is "twenty-six million, six hundred sixty-seven thousand, nine hundred sixty-one".