26672756420 has 12 divisors (see below), whose sum is σ = 56012788524. Its totient is φ = 10669102560.

The previous prime is 26672756417. The next prime is 26672756443. The reversal of 26672756420 is 2465727662.

It can be written as a sum of positive squares in 2 ways, for example, as 20856558724 + 5816197696 = 144418^2 + 76264^2 .

It is a super-2 number, since 2×26672756420² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666818891 + ... + 666818930.

It is an arithmetic number, because the mean of its divisors is an integer number (4667732377).

Almost surely, 2^26672756420 is an apocalyptic number.

26672756420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26672756420 is an abundant number, since it is smaller than the sum of its proper divisors (29340032104).

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

26672756420 is a wasteful number, since it uses less digits than its factorization.

26672756420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333637830 (or 1333637828 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 26672756420 in words is "twenty-six billion, six hundred seventy-two million, seven hundred fifty-six thousand, four hundred twenty".