26466660040 has 16 divisors (see below), whose sum is σ = 59549985180. Its totient is φ = 10586664000.

The previous prime is 26466660023. The next prime is 26466660083. The reversal of 26466660040 is 4006666462.

It can be written as a sum of positive squares in 2 ways, for example, as 24716241796 + 1750418244 = 157214^2 + 41838^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 661666501 = 26466660040 / (2 + 6 + 4 + 6 + 6 + 6 + 6 + 0 + 0 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 26466659975 and 26466660002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330833211 + ... + 330833290.

Almost surely, 2^26466660040 is an apocalyptic number.

26466660040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26466660040 is an abundant number, since it is smaller than the sum of its proper divisors (33083325140).

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

26466660040 is a wasteful number, since it uses less digits than its factorization.

26466660040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661666512 (or 661666508 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 26466660040 in words is "twenty-six billion, four hundred sixty-six million, six hundred sixty thousand, forty".