66702005 has 8 divisors (see below), whose sum is σ = 80777400. Its totient is φ = 52871616.

The previous prime is 66701993. The next prime is 66702017. The reversal of 66702005 is 50020766.

It is an interprime number because it is at equal distance from previous prime (66701993) and next prime (66702017).

It can be written as a sum of positive squares in 4 ways, for example, as 24373969 + 42328036 = 4937^2 + 6506^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66702005 - 2¹² = 66697909 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 60650 + ... + 61739.

It is an arithmetic number, because the mean of its divisors is an integer number (10097175).

Almost surely, 2^66702005 is an apocalyptic number.

It is an amenable number.

66702005 is a deficient number, since it is larger than the sum of its proper divisors (14075395).

66702005 is a wasteful number, since it uses less digits than its factorization.

66702005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122503.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 66702005 is about 8167.1295447054. The cubic root of 66702005 is about 405.5517653434.

The spelling of 66702005 in words is "sixty-six million, seven hundred two thousand, five".