66012442 has 4 divisors (see below), whose sum is σ = 99018666. Its totient is φ = 33006220.

The previous prime is 66012433. The next prime is 66012451. The reversal of 66012442 is 24421066.

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 (66012433) and next prime (66012451).

It can be written as a sum of positive squares in only one way, i.e., 61168041 + 4844401 = 7821^2 + 2201^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16503109 + ... + 16503112.

Almost surely, 2^66012442 is an apocalyptic number.

66012442 is a deficient number, since it is larger than the sum of its proper divisors (33006224).

66012442 is a wasteful number, since it uses less digits than its factorization.

66012442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33006223.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 66012442 is about 8124.8041207158. The cubic root of 66012442 is about 404.1493949658.

The spelling of 66012442 in words is "sixty-six million, twelve thousand, four hundred forty-two".