26646767764 has 6 divisors (see below), whose sum is σ = 46631843594. Its totient is φ = 13323383880.

The previous prime is 26646767753. The next prime is 26646767767. The reversal of 26646767764 is 46776764662.

It can be written as a sum of positive squares in only one way, i.e., 20251566864 + 6395200900 = 142308^2 + 79970^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26646767767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330845967 + ... + 3330845974.

Almost surely, 2^26646767764 is an apocalyptic number.

It is an amenable number.

26646767764 is a deficient number, since it is larger than the sum of its proper divisors (19985075830).

26646767764 is a wasteful number, since it uses less digits than its factorization.

26646767764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661691945 (or 6661691943 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 61.

The spelling of 26646767764 in words is "twenty-six billion, six hundred forty-six million, seven hundred sixty-seven thousand, seven hundred sixty-four".