66201066 has 24 divisors (see below), whose sum is σ = 147313764. Its totient is φ = 21470400.

The previous prime is 66201053. The next prime is 66201097. The reversal of 66201066 is 66010266.

It can be written as a sum of positive squares in 2 ways, for example, as 60512841 + 5688225 = 7779^2 + 2385^2 .

It is a super-2 number, since 2×66201066² = 8765162279072712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49035 + ... + 50366.

Almost surely, 2^66201066 is an apocalyptic number.

66201066 is an abundant number, since it is smaller than the sum of its proper divisors (81112698).

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

66201066 is a wasteful number, since it uses less digits than its factorization.

66201066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99446 (or 99443 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66201066 is about 8136.4037510438. The cubic root of 66201066 is about 404.5339678306.

The spelling of 66201066 in words is "sixty-six million, two hundred one thousand, sixty-six".