66021352042 has 8 divisors (see below), whose sum is σ = 101708569476. Its totient is φ = 32118495552.

The previous prime is 66021352021. The next prime is 66021352123. The reversal of 66021352042 is 24025312066.

It can be written as a sum of positive squares in 2 ways, for example, as 62380557121 + 3640794921 = 249761^2 + 60339^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 66021351995 and 66021352013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446090143 + ... + 446090290.

Almost surely, 2^66021352042 is an apocalyptic number.

66021352042 is a deficient number, since it is larger than the sum of its proper divisors (35687217434).

66021352042 is a wasteful number, since it uses less digits than its factorization.

66021352042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892180472.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 66021352042 in words is "sixty-six billion, twenty-one million, three hundred fifty-two thousand, forty-two".