66021027 has 8 divisors (see below), whose sum is σ = 88131264. Its totient is φ = 43962408.

The previous prime is 66021019. The next prime is 66021037. The reversal of 66021027 is 72012066.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66021027 - 2³ = 66021019 is a prime.

It is a super-2 number, since 2×66021027² = 8717552012269458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66020988 and 66021006.

It is not an unprimeable number, because it can be changed into a prime (66021037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9813 + ... + 15110.

It is an arithmetic number, because the mean of its divisors is an integer number (11016408).

Almost surely, 2^66021027 is an apocalyptic number.

66021027 is a deficient number, since it is larger than the sum of its proper divisors (22110237).

66021027 is a wasteful number, since it uses less digits than its factorization.

66021027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25809.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 66021027 is about 8125.3324239689. The cubic root of 66021027 is about 404.1669142498.

The spelling of 66021027 in words is "sixty-six million, twenty-one thousand, twenty-seven".