266060640 has 48 divisors (see below), whose sum is σ = 838092528. Its totient is φ = 70949376.

The previous prime is 266060623. The next prime is 266060657. The reversal of 266060640 is 46060662.

It is an interprime number because it is at equal distance from previous prime (266060623) and next prime (266060657).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 266060598 and 266060607.

It is a congruent 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, 276667 + ... + 277626.

It is an arithmetic number, because the mean of its divisors is an integer number (17460261).

Almost surely, 2^266060640 is an apocalyptic number.

266060640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266060640 is an abundant number, since it is smaller than the sum of its proper divisors (572031888).

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

266060640 is a wasteful number, since it uses less digits than its factorization.

266060640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554311 (or 554303 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 266060640 is about 16311.3653628383. The cubic root of 266060640 is about 643.1716263071.

266060640 divided by its sum of digits (30) gives a palindrome (8868688).

The spelling of 266060640 in words is "two hundred sixty-six million, sixty thousand, six hundred forty".