26661672 has 72 divisors (see below), whose sum is σ = 75365550. Its totient is φ = 8504832.

The previous prime is 26661647. The next prime is 26661683. The reversal of 26661672 is 27616662.

It can be written as a sum of positive squares in 3 ways, for example, as 7001316 + 19660356 = 2646^2 + 4434^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 235888 + ... + 236000.

Almost surely, 2^26661672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26661672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37682775).

26661672 is an abundant number, since it is smaller than the sum of its proper divisors (48703878).

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

26661672 is a wasteful number, since it uses less digits than its factorization.

26661672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 147 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 26661672 is about 5163.4941657757. The cubic root of 26661672 is about 298.7416626701.

The spelling of 26661672 in words is "twenty-six million, six hundred sixty-one thousand, six hundred seventy-two".