66997027 has 8 divisors (see below), whose sum is σ = 68188400. Its totient is φ = 65816064.

The previous prime is 66997013. The next prime is 66997031. The reversal of 66997027 is 72079966.

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

It is a cyclic number.

It is not a de Polignac number, because 66997027 - 2¹⁹ = 66472739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66997127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10999 + ... + 15967.

It is an arithmetic number, because the mean of its divisors is an integer number (8523550).

Almost surely, 2^66997027 is an apocalyptic number.

66997027 is a deficient number, since it is larger than the sum of its proper divisors (1191373).

66997027 is a wasteful number, since it uses less digits than its factorization.

66997027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 66997027 is about 8185.1711649788. The cubic root of 66997027 is about 406.1488025017.

The spelling of 66997027 in words is "sixty-six million, nine hundred ninety-seven thousand, twenty-seven".