266400054 has 48 divisors (see below), whose sum is σ = 589237584. Its totient is φ = 86961600.

The previous prime is 266400049. The next prime is 266400059. The reversal of 266400054 is 450004662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (266400049) and next prime (266400059).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266400059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363072 + ... + 363804.

It is an arithmetic number, because the mean of its divisors is an integer number (12275783).

Almost surely, 2^266400054 is an apocalyptic number.

266400054 is an abundant number, since it is smaller than the sum of its proper divisors (322837530).

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

266400054 is a wasteful number, since it uses less digits than its factorization.

266400054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 266400054 is about 16321.7662647153. The cubic root of 266400054 is about 643.4450084590.

The spelling of 266400054 in words is "two hundred sixty-six million, four hundred thousand, fifty-four".