66402213146 has 16 divisors (see below), whose sum is σ = 105506538984. Its totient is φ = 31235003904.

The previous prime is 66402213127. The next prime is 66402213149. The reversal of 66402213146 is 64131220466.

It can be written as a sum of positive squares in 4 ways, for example, as 31072875625 + 35329337521 = 176275^2 + 187961^2 .

It is not an unprimeable number, because it can be changed into a prime (66402213149) 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, 326705 + ... + 489428.

Almost surely, 2^66402213146 is an apocalyptic number.

66402213146 is a deficient number, since it is larger than the sum of its proper divisors (39104325838).

66402213146 is a wasteful number, since it uses less digits than its factorization.

66402213146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818545.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 66402213146 in words is "sixty-six billion, four hundred two million, two hundred thirteen thousand, one hundred forty-six".