66408235422 has 16 divisors (see below), whose sum is σ = 135322442640. Its totient is φ = 21718416512.

The previous prime is 66408235373. The next prime is 66408235423. The reversal of 66408235422 is 22453280466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66408235423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104415147 + ... + 104415782.

It is an arithmetic number, because the mean of its divisors is an integer number (8457652665).

Almost surely, 2^66408235422 is an apocalyptic number.

66408235422 is an abundant number, since it is smaller than the sum of its proper divisors (68914207218).

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

66408235422 is a wasteful number, since it uses less digits than its factorization.

66408235422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208830987.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 66408235422 in words is "sixty-six billion, four hundred eight million, two hundred thirty-five thousand, four hundred twenty-two".