66006242 has 4 divisors (see below), whose sum is σ = 99009366. Its totient is φ = 33003120.

The previous prime is 66006221. The next prime is 66006263. The reversal of 66006242 is 24260066.

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

It is an interprime number because it is at equal distance from previous prime (66006221) and next prime (66006263).

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 29149201 = 6071^2 + 5399^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16501559 + ... + 16501562.

Almost surely, 2^66006242 is an apocalyptic number.

66006242 is a deficient number, since it is larger than the sum of its proper divisors (33003124).

66006242 is a wasteful number, since it uses less digits than its factorization.

66006242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003123.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66006242 is about 8124.4225640965. The cubic root of 66006242 is about 404.1367417718.

The spelling of 66006242 in words is "sixty-six million, six thousand, two hundred forty-two".