66890602 has 8 divisors (see below), whose sum is σ = 105616800. Its totient is φ = 31685004.

The previous prime is 66890599. The next prime is 66890627. The reversal of 66890602 is 20609866.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880102 + ... + 880177.

It is an arithmetic number, because the mean of its divisors is an integer number (13202100).

Almost surely, 2^66890602 is an apocalyptic number.

66890602 is a deficient number, since it is larger than the sum of its proper divisors (38726198).

66890602 is a wasteful number, since it uses less digits than its factorization.

66890602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760300.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 66890602 is about 8178.6674953809. The cubic root of 66890602 is about 405.9336322879.

The spelling of 66890602 in words is "sixty-six million, eight hundred ninety thousand, six hundred two".