66402844 has 12 divisors (see below), whose sum is σ = 117797344. Its totient is φ = 32746464.

The previous prime is 66402823. The next prime is 66402851. The reversal of 66402844 is 44820466.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 113412 + ... + 113995.

Almost surely, 2^66402844 is an apocalyptic number.

It is an amenable number.

66402844 is a deficient number, since it is larger than the sum of its proper divisors (51394500).

66402844 is a wasteful number, since it uses less digits than its factorization.

66402844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227484 (or 227482 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 66402844 is about 8148.7940212034. The cubic root of 66402844 is about 404.9445516733.

The spelling of 66402844 in words is "sixty-six million, four hundred two thousand, eight hundred forty-four".