66271774 has 4 divisors (see below), whose sum is σ = 99407664. Its totient is φ = 33135886.

The previous prime is 66271747. The next prime is 66271789. The reversal of 66271774 is 47717266.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16567942 + ... + 16567945.

It is an arithmetic number, because the mean of its divisors is an integer number (24851916).

Almost surely, 2^66271774 is an apocalyptic number.

66271774 is a deficient number, since it is larger than the sum of its proper divisors (33135890).

66271774 is a wasteful number, since it uses less digits than its factorization.

66271774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33135889.

The product of its digits is 98784, while the sum is 40.

The square root of 66271774 is about 8140.7477543528. The cubic root of 66271774 is about 404.6779413941.

The spelling of 66271774 in words is "sixty-six million, two hundred seventy-one thousand, seven hundred seventy-four".