26664894097 has 4 divisors (see below), whose sum is σ = 26669563956. Its totient is φ = 26660224240.

The previous prime is 26664894073. The next prime is 26664894107. The reversal of 26664894097 is 79049846662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11327557761 + 15337336336 = 106431^2 + 123844^2 .

It is a cyclic number.

It is not a de Polignac number, because 26664894097 - 2²³ = 26656505489 is a prime.

It is a super-2 number, since 2×26664894097² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26664894197) 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, 2326354 + ... + 2337787.

It is an arithmetic number, because the mean of its divisors is an integer number (6667390989).

Almost surely, 2^26664894097 is an apocalyptic number.

It is an amenable number.

26664894097 is a deficient number, since it is larger than the sum of its proper divisors (4669859).

26664894097 is an equidigital number, since it uses as much as digits as its factorization.

26664894097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669858.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 26664894097 in words is "twenty-six billion, six hundred sixty-four million, eight hundred ninety-four thousand, ninety-seven".