266325640020 has 144 divisors (see below), whose sum is σ = 881460740160. Its totient is φ = 64551705600.

The previous prime is 266325639967. The next prime is 266325640037. The reversal of 266325640020 is 20046523662.

266325640020 is a `hidden beast` number, since 2 + 6 + 6 + 3 + 2 + 5 + 640 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15219436 + ... + 15236924.

It is an arithmetic number, because the mean of its divisors is an integer number (6121255140).

Almost surely, 2^266325640020 is an apocalyptic number.

266325640020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266325640020 is an abundant number, since it is smaller than the sum of its proper divisors (615135100140).

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

266325640020 is a wasteful number, since it uses less digits than its factorization.

266325640020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25206 (or 25201 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 266325640020 in words is "two hundred sixty-six billion, three hundred twenty-five million, six hundred forty thousand, twenty".