660406602 has 16 divisors (see below), whose sum is σ = 1326078432. Its totient is φ = 219258000.

The previous prime is 660406597. The next prime is 660406603. The reversal of 660406602 is 206604066.

It is a super-2 number, since 2×660406602² = 872273759930372808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660406602.

It is not an unprimeable number, because it can be changed into a prime (660406603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217753 + ... + 220764.

It is an arithmetic number, because the mean of its divisors is an integer number (82879902).

Almost surely, 2^660406602 is an apocalyptic number.

660406602 is an abundant number, since it is smaller than the sum of its proper divisors (665671830).

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

660406602 is a wasteful number, since it uses less digits than its factorization.

660406602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438773.

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

The square root of 660406602 is about 25698.3774195960. The cubic root of 660406602 is about 870.8375261496.

The spelling of 660406602 in words is "six hundred sixty million, four hundred six thousand, six hundred two".