266400051 has 16 divisors (see below), whose sum is σ = 360842400. Its totient is φ = 174797568.

The previous prime is 266400049. The next prime is 266400059. The reversal of 266400051 is 150004662.

It is not a de Polignac number, because 266400051 - 2¹ = 266400049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266399994 and 266400030.

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 15 ways as a sum of consecutive naturals, for example, 58965 + ... + 63321.

It is an arithmetic number, because the mean of its divisors is an integer number (22552650).

Almost surely, 2^266400051 is an apocalyptic number.

266400051 is a deficient number, since it is larger than the sum of its proper divisors (94442349).

266400051 is a wasteful number, since it uses less digits than its factorization.

266400051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 266400051 is about 16321.7661728135. The cubic root of 266400051 is about 643.4450060437.

The spelling of 266400051 in words is "two hundred sixty-six million, four hundred thousand, fifty-one".