266401608 has 32 divisors (see below), whose sum is σ = 726550560. Its totient is φ = 80727680.

The previous prime is 266401607. The next prime is 266401609. The reversal of 266401608 is 806104662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (266401607) and next prime (266401609).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (266401607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504285 + ... + 504812.

It is an arithmetic number, because the mean of its divisors is an integer number (22704705).

Almost surely, 2^266401608 is an apocalyptic number.

It is an amenable number.

266401608 is an abundant number, since it is smaller than the sum of its proper divisors (460148952).

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

266401608 is a wasteful number, since it uses less digits than its factorization.

266401608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009117 (or 1009113 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 266401608 is about 16321.8138697879. The cubic root of 266401608 is about 643.4462595994.

The spelling of 266401608 in words is "two hundred sixty-six million, four hundred one thousand, six hundred eight".