66402488 has 16 divisors (see below), whose sum is σ = 125669880. Its totient is φ = 32890528.

The previous prime is 66402463. The next prime is 66402491. The reversal of 66402488 is 88420466.

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 3 ways as a sum of consecutive naturals, for example, 37931 + ... + 39642.

Almost surely, 2^66402488 is an apocalyptic number.

It is an amenable number.

66402488 is a deficient number, since it is larger than the sum of its proper divisors (59267392).

66402488 is a wasteful number, since it uses less digits than its factorization.

66402488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77686 (or 77682 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 66402488 is about 8148.7721774510. The cubic root of 66402488 is about 404.9438280069.

The spelling of 66402488 in words is "sixty-six million, four hundred two thousand, four hundred eighty-eight".