66453213642 has 16 divisors (see below), whose sum is σ = 132909335040. Its totient is φ = 22150586592.

The previous prime is 66453213613. The next prime is 66453213667. The reversal of 66453213642 is 24631235466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66453213594 and 66453213603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276183 + ... + 457365.

It is an arithmetic number, because the mean of its divisors is an integer number (8306833440).

Almost surely, 2^66453213642 is an apocalyptic number.

66453213642 is an abundant number, since it is smaller than the sum of its proper divisors (66456121398).

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

66453213642 is a wasteful number, since it uses less digits than its factorization.

66453213642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242317.

The product of its digits is 622080, while the sum is 42.

The spelling of 66453213642 in words is "sixty-six billion, four hundred fifty-three million, two hundred thirteen thousand, six hundred forty-two".