266352478342540 has 24 divisors (see below), whose sum is σ = 559356988307040. Its totient is φ = 106537794425088.

The previous prime is 266352478342537. The next prime is 266352478342627. The reversal of 266352478342540 is 45243874253662.

It is a happy number.

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, 199123752 + ... + 200456911.

It is an arithmetic number, because the mean of its divisors is an integer number (23306541179460).

Almost surely, 2^{266352478342540} is an apocalyptic number.

266352478342540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266352478342540 is an abundant number, since it is smaller than the sum of its proper divisors (293004509964500).

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

266352478342540 is a wasteful number, since it uses less digits than its factorization.

266352478342540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399614001 (or 399613999 counting only the distinct ones).

The product of its (nonzero) digits is 232243200, while the sum is 61.

The spelling of 266352478342540 in words is "two hundred sixty-six trillion, three hundred fifty-two billion, four hundred seventy-eight million, three hundred forty-two thousand, five hundred forty".