266920680 has 64 divisors (see below), whose sum is σ = 862364160. Its totient is φ = 65703168.

The previous prime is 266920673. The next prime is 266920729. The reversal of 266920680 is 86029662.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83992 + ... + 87111.

It is an arithmetic number, because the mean of its divisors is an integer number (13474440).

Almost surely, 2^266920680 is an apocalyptic number.

266920680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266920680 is an abundant number, since it is smaller than the sum of its proper divisors (595443480).

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

266920680 is a wasteful number, since it uses less digits than its factorization.

266920680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171130 (or 171126 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 266920680 is about 16337.7073054942. The cubic root of 266920680 is about 643.8638975271.

The spelling of 266920680 in words is "two hundred sixty-six million, nine hundred twenty thousand, six hundred eighty".