66627371 has 4 divisors (see below), whose sum is σ = 66840552. Its totient is φ = 66414192.

The previous prime is 66627359. The next prime is 66627409. The reversal of 66627371 is 17372666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66627371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66627331) 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, 106121 + ... + 106746.

It is an arithmetic number, because the mean of its divisors is an integer number (16710138).

Almost surely, 2^66627371 is an apocalyptic number.

66627371 is a deficient number, since it is larger than the sum of its proper divisors (213181).

66627371 is a wasteful number, since it uses less digits than its factorization.

66627371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213180.

The product of its digits is 63504, while the sum is 38.

The square root of 66627371 is about 8162.5590962639. The cubic root of 66627371 is about 405.4004493193.

The spelling of 66627371 in words is "sixty-six million, six hundred twenty-seven thousand, three hundred seventy-one".