66854027 has 4 divisors (see below), whose sum is σ = 70372680. Its totient is φ = 63335376.

The previous prime is 66854023. The next prime is 66854071. The reversal of 66854027 is 72045866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66854027 - 2² = 66854023 is a prime.

It is a super-2 number, since 2×66854027² = 8938921852233458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66854023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759298 + ... + 1759335.

It is an arithmetic number, because the mean of its divisors is an integer number (17593170).

Almost surely, 2^66854027 is an apocalyptic number.

66854027 is a deficient number, since it is larger than the sum of its proper divisors (3518653).

66854027 is a wasteful number, since it uses less digits than its factorization.

66854027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518652.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 66854027 is about 8176.4311897062. The cubic root of 66854027 is about 405.8596322089.

The spelling of 66854027 in words is "sixty-six million, eight hundred fifty-four thousand, twenty-seven".