266789916 has 96 divisors (see below), whose sum is σ = 712212480. Its totient is φ = 86329152.

The previous prime is 266789819. The next prime is 266789933. The reversal of 266789916 is 619987662.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 726765 + ... + 727131.

It is an arithmetic number, because the mean of its divisors is an integer number (7418880).

Almost surely, 2^266789916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266789916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356106240).

266789916 is an abundant number, since it is smaller than the sum of its proper divisors (445422564).

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

266789916 is a wasteful number, since it uses less digits than its factorization.

266789916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 552 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 266789916 is about 16333.7049073381. The cubic root of 266789916 is about 643.7587377329.

The spelling of 266789916 in words is "two hundred sixty-six million, seven hundred eighty-nine thousand, nine hundred sixteen".