66402804142 has 32 divisors (see below), whose sum is σ = 102228176160. Its totient is φ = 32340072960.

The previous prime is 66402804131. The next prime is 66402804179. The reversal of 66402804142 is 24140820466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4974417 + ... + 4987747.

It is an arithmetic number, because the mean of its divisors is an integer number (3194630505).

Almost surely, 2^66402804142 is an apocalyptic number.

66402804142 is a deficient number, since it is larger than the sum of its proper divisors (35825372018).

66402804142 is a wasteful number, since it uses less digits than its factorization.

66402804142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13828.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 66402804142 in words is "sixty-six billion, four hundred two million, eight hundred four thousand, one hundred forty-two".