266194599540 has 48 divisors (see below), whose sum is σ = 745433001600. Its totient is φ = 70976833920.

The previous prime is 266194599533. The next prime is 266194599553. The reversal of 266194599540 is 45995491662.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257970 + ... + 773910.

It is an arithmetic number, because the mean of its divisors is an integer number (15529854200).

Almost surely, 2^266194599540 is an apocalyptic number.

266194599540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 515940×515941.

It is an amenable number.

266194599540 is an abundant number, since it is smaller than the sum of its proper divisors (479238402060).

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

266194599540 is a wasteful number, since it uses less digits than its factorization.

266194599540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524552 (or 524550 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 60.

The spelling of 266194599540 in words is "two hundred sixty-six billion, one hundred ninety-four million, five hundred ninety-nine thousand, five hundred forty".