26664961 has 8 divisors (see below), whose sum is σ = 28118880. Its totient is φ = 25216128.

The previous prime is 26664947. The next prime is 26664971. The reversal of 26664961 is 16946662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26664961 - 2¹¹ = 26662913 is a prime.

It is a super-2 number, since 2×26664961² = 1422040290263042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26664931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14865 + ... + 16561.

It is an arithmetic number, because the mean of its divisors is an integer number (3514860).

It is a Proth number, since it is equal to 3255 ⋅ 2¹³ + 1 and 3255 < 2¹³.

Almost surely, 2^26664961 is an apocalyptic number.

It is an amenable number.

26664961 is a deficient number, since it is larger than the sum of its proper divisors (1453919).

26664961 is a wasteful number, since it uses less digits than its factorization.

26664961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543.

The product of its digits is 93312, while the sum is 40.

The square root of 26664961 is about 5163.8126418374. The cubic root of 26664961 is about 298.7539464824.

The spelling of 26664961 in words is "twenty-six million, six hundred sixty-four thousand, nine hundred sixty-one".