66042610 has 16 divisors (see below), whose sum is σ = 119021400. Its totient is φ = 26384896.

The previous prime is 66042601. The next prime is 66042619. The reversal of 66042610 is 1624066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66042601) and next prime (66042619).

It can be written as a sum of positive squares in 4 ways, for example, as 20169081 + 45873529 = 4491^2 + 6773^2 .

It is a super-2 number, since 2×66042610² = 8723252671224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66042619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5736 + ... + 12844.

Almost surely, 2^66042610 is an apocalyptic number.

66042610 is a deficient number, since it is larger than the sum of its proper divisors (52978790).

66042610 is a wasteful number, since it uses less digits than its factorization.

66042610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 66042610 is about 8126.6604457182. The cubic root of 66042610 is about 404.2109516548.

Adding to 66042610 its reverse (1624066), we get a palindrome (67666676).

The spelling of 66042610 in words is "sixty-six million, forty-two thousand, six hundred ten".