266195408 has 40 divisors (see below), whose sum is σ = 535010400. Its totient is φ = 128153984.

The previous prime is 266195387. The next prime is 266195431. The reversal of 266195408 is 804591662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260723 + ... + 261741.

It is an arithmetic number, because the mean of its divisors is an integer number (13375260).

Almost surely, 2^266195408 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 266195408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267505200).

266195408 is an abundant number, since it is smaller than the sum of its proper divisors (268814992).

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

266195408 is a wasteful number, since it uses less digits than its factorization.

266195408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 266195408 is about 16315.4959471050. The cubic root of 266195408 is about 643.2802034628.

The spelling of 266195408 in words is "two hundred sixty-six million, one hundred ninety-five thousand, four hundred eight".