26661115120 has 40 divisors (see below), whose sum is σ = 62164771200. Its totient is φ = 10633877760.

The previous prime is 26661115057. The next prime is 26661115133. The reversal of 26661115120 is 2151116662.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×26661115120² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449536 + ... + 505375.

It is an arithmetic number, because the mean of its divisors is an integer number (1554119280).

Almost surely, 2^26661115120 is an apocalyptic number.

26661115120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26661115120 is an abundant number, since it is smaller than the sum of its proper divisors (35503656080).

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

26661115120 is a wasteful number, since it uses less digits than its factorization.

26661115120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955273 (or 955267 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 26661115120 in words is "twenty-six billion, six hundred sixty-one million, one hundred fifteen thousand, one hundred twenty".