266406672 has 80 divisors (see below), whose sum is σ = 804869120. Its totient is φ = 74342016.

The previous prime is 266406667. The next prime is 266406683. The reversal of 266406672 is 276604662.

It is a super-2 number, since 2×266406672² = 141945029772231168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266406672.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5229 + ... + 23667.

It is an arithmetic number, because the mean of its divisors is an integer number (10060864).

Almost surely, 2^266406672 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 266406672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402434560).

266406672 is an abundant number, since it is smaller than the sum of its proper divisors (538462448).

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

266406672 is a wasteful number, since it uses less digits than its factorization.

266406672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18500 (or 18494 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 266406672 is about 16321.9689988678. The cubic root of 266406672 is about 643.4503366409.

The spelling of 266406672 in words is "two hundred sixty-six million, four hundred six thousand, six hundred seventy-two".