26668655686662 has 32 divisors (see below), whose sum is σ = 58186919687040. Its totient is φ = 8081305005120.

The previous prime is 26668655686637. The next prime is 26668655686733.

26668655686662 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×26668655686662² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2509389 + ... + 7722327.

It is an arithmetic number, because the mean of its divisors is an integer number (1818341240220).

Almost surely, 2^{26668655686662} is an apocalyptic number.

26668655686662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

26668655686662 is an abundant number, since it is smaller than the sum of its proper divisors (31518264000378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26668655686662 is a wasteful number, since it uses less digits than its factorization.

26668655686662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290468.

The product of its digits is 10749542400, while the sum is 78.

The spelling of 26668655686662 in words is "twenty-six trillion, six hundred sixty-eight billion, six hundred fifty-five million, six hundred eighty-six thousand, six hundred sixty-two".