66406602 has 8 divisors (see below), whose sum is σ = 132813216. Its totient is φ = 22135532.

The previous prime is 66406583. The next prime is 66406603. The reversal of 66406602 is 20660466.

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

66406602 is an admirable number.

It is a super-3 number, since 3×66406602³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66406602.

It is not an unprimeable number, because it can be changed into a prime (66406603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5533878 + ... + 5533889.

It is an arithmetic number, because the mean of its divisors is an integer number (16601652).

Almost surely, 2^66406602 is an apocalyptic number.

66406602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66406602 is a wasteful number, since it uses less digits than its factorization.

66406602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11067772.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66406602 is about 8149.0246042088. The cubic root of 66406602 is about 404.9521906680.

The spelling of 66406602 in words is "sixty-six million, four hundred six thousand, six hundred two".