66277266 has 24 divisors (see below), whose sum is σ = 145702032. Its totient is φ = 20083800.

The previous prime is 66277261. The next prime is 66277273.

66277266 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (66277261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44920 + ... + 46371.

It is an arithmetic number, because the mean of its divisors is an integer number (6070918).

Almost surely, 2^66277266 is an apocalyptic number.

66277266 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66277266 is an abundant number, since it is smaller than the sum of its proper divisors (79424766).

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

66277266 is a wasteful number, since it uses less digits than its factorization.

66277266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91318 (or 91307 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 66277266 is about 8141.0850628156. The cubic root of 66277266 is about 404.6891197572.

The spelling of 66277266 in words is "sixty-six million, two hundred seventy-seven thousand, two hundred sixty-six".