66532274 has 4 divisors (see below), whose sum is σ = 99798414. Its totient is φ = 33266136.

The previous prime is 66532247. The next prime is 66532289. The reversal of 66532274 is 47223566.

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

It can be written as a sum of positive squares in only one way, i.e., 63091249 + 3441025 = 7943^2 + 1855^2 .

It is a super-2 number, since 2×66532274² = 8853086967222152, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16633067 + ... + 16633070.

Almost surely, 2^66532274 is an apocalyptic number.

66532274 is a deficient number, since it is larger than the sum of its proper divisors (33266140).

66532274 is a wasteful number, since it uses less digits than its factorization.

66532274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33266139.

The product of its digits is 60480, while the sum is 35.

The square root of 66532274 is about 8156.7318210175. The cubic root of 66532274 is about 405.2074819627.

The spelling of 66532274 in words is "sixty-six million, five hundred thirty-two thousand, two hundred seventy-four".