26640004662 has 48 divisors (see below), whose sum is σ = 59635229472. Its totient is φ = 8588229120.

The previous prime is 26640004637. The next prime is 26640004663.

26640004662 is a `hidden beast` number, since 2 + 6 + 640 + 0 + 0 + 4 + 6 + 6 + 2 = 666.

26640004662 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640004663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8539 + ... + 230982.

It is an arithmetic number, because the mean of its divisors is an integer number (1242400614).

Almost surely, 2^26640004662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26640004662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29817614736).

26640004662 is an abundant number, since it is smaller than the sum of its proper divisors (32995224810).

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

26640004662 is a wasteful number, since it uses less digits than its factorization.

26640004662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239733 (or 239730 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

It can be divided in two parts, 2664000 and 4662, that added together give a palindrome (2668662).

The spelling of 26640004662 in words is "twenty-six billion, six hundred forty million, four thousand, six hundred sixty-two".