26640666666466 has 16 divisors (see below), whose sum is σ = 41339424234240. Its totient is φ = 12860868782160.

The previous prime is 26640666666461. The next prime is 26640666666527. The reversal of 26640666666466 is 66466666604662.

It is a junction number, because it is equal to n+sod(n) for n = 26640666666395 and 26640666666404.

It is not an unprimeable number, because it can be changed into a prime (26640666666461) 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, 2820175 + ... + 7825261.

It is an arithmetic number, because the mean of its divisors is an integer number (2583714014640).

Almost surely, 2^{26640666666466} is an apocalyptic number.

26640666666466 is a deficient number, since it is larger than the sum of its proper divisors (14698757567774).

26640666666466 is a wasteful number, since it uses less digits than its factorization.

26640666666466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096889.

The product of its (nonzero) digits is 1934917632, while the sum is 70.

The spelling of 26640666666466 in words is "twenty-six trillion, six hundred forty billion, six hundred sixty-six million, six hundred sixty-six thousand, four hundred sixty-six".