266151108640 has 48 divisors (see below), whose sum is σ = 629285895000. Its totient is φ = 106375127040.

The previous prime is 266151108527. The next prime is 266151108661. The reversal of 266151108640 is 46801151662.

It can be written as a sum of positive squares in 4 ways, for example, as 111761838864 + 154389269776 = 334308^2 + 392924^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 266151108593 and 266151108602.

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, 466071 + ... + 865750.

Almost surely, 2^266151108640 is an apocalyptic number.

266151108640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266151108640 is an abundant number, since it is smaller than the sum of its proper divisors (363134786360).

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

266151108640 is a wasteful number, since it uses less digits than its factorization.

266151108640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333085 (or 1333077 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 266151108640 in words is "two hundred sixty-six billion, one hundred fifty-one million, one hundred eight thousand, six hundred forty".