66290442 has 8 divisors (see below), whose sum is σ = 132580896. Its totient is φ = 22096812.

The previous prime is 66290437. The next prime is 66290443. The reversal of 66290442 is 24409266.

It is a happy number.

66290442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

66290442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66290443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5524198 + ... + 5524209.

It is an arithmetic number, because the mean of its divisors is an integer number (16572612).

Almost surely, 2^66290442 is an apocalyptic number.

66290442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66290442 is a wasteful number, since it uses less digits than its factorization.

66290442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048412.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66290442 is about 8141.8942513398. The cubic root of 66290442 is about 404.7159355411.

The spelling of 66290442 in words is "sixty-six million, two hundred ninety thousand, four hundred forty-two".