66277016 has 64 divisors (see below), whose sum is σ = 149234400. Its totient is φ = 27260928.

The previous prime is 66276989. The next prime is 66277019. The reversal of 66277016 is 61077266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66277019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32606 + ... + 34578.

Almost surely, 2^66277016 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 66277016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74617200).

66277016 is an abundant number, since it is smaller than the sum of its proper divisors (82957384).

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

66277016 is a wasteful number, since it uses less digits than its factorization.

66277016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 66277016 is about 8141.0697085825. The cubic root of 66277016 is about 404.6886109230.

The spelling of 66277016 in words is "sixty-six million, two hundred seventy-seven thousand, sixteen".