266240064666 has 16 divisors (see below), whose sum is σ = 532653105600. Its totient is φ = 88717858848.

The previous prime is 266240064653. The next prime is 266240064721. The reversal of 266240064666 is 666460042662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7187331 + ... + 7224278.

It is an arithmetic number, because the mean of its divisors is an integer number (33290819100).

Almost surely, 2^266240064666 is an apocalyptic number.

266240064666 is an abundant number, since it is smaller than the sum of its proper divisors (266413040934).

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

266240064666 is a wasteful number, since it uses less digits than its factorization.

266240064666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14414693.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 266240064666 in words is "two hundred sixty-six billion, two hundred forty million, sixty-four thousand, six hundred sixty-six".