66059999 has 8 divisors (see below), whose sum is σ = 69498000. Its totient is φ = 62699392.

The previous prime is 66059969. The next prime is 66060031. The reversal of 66059999 is 99995066.

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

It is not a de Polignac number, because 66059999 - 2⁸ = 66059743 is a prime.

It is a Duffinian number.

66059999 is a modest number, since divided by 9999 gives 6605 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 66059999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66059969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17594 + ... + 21015.

It is an arithmetic number, because the mean of its divisors is an integer number (8687250).

Almost surely, 2^66059999 is an apocalyptic number.

66059999 is a deficient number, since it is larger than the sum of its proper divisors (3438001).

66059999 is a wasteful number, since it uses less digits than its factorization.

66059999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38697.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The square root of 66059999 is about 8127.7302489687. The cubic root of 66059999 is about 404.2464247503.

The spelling of 66059999 in words is "sixty-six million, fifty-nine thousand, nine hundred ninety-nine".