66326642 has 8 divisors (see below), whose sum is σ = 101121132. Its totient is φ = 32619600.

The previous prime is 66326591. The next prime is 66326647. The reversal of 66326642 is 24662366.

It can be written as a sum of positive squares in 2 ways, for example, as 58813561 + 7513081 = 7669^2 + 2741^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66326647) 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, 271709 + ... + 271952.

Almost surely, 2^66326642 is an apocalyptic number.

66326642 is a deficient number, since it is larger than the sum of its proper divisors (34794490).

66326642 is a wasteful number, since it uses less digits than its factorization.

66326642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543724.

The product of its digits is 62208, while the sum is 35.

The square root of 66326642 is about 8144.1170178234. The cubic root of 66326642 is about 404.7895914630.

The spelling of 66326642 in words is "sixty-six million, three hundred twenty-six thousand, six hundred forty-two".