66151810 has 8 divisors (see below), whose sum is σ = 119073276. Its totient is φ = 26460720.

The previous prime is 66151801. The next prime is 66151817. The reversal of 66151810 is 1815166.

66151810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65593801 + 558009 = 8099^2 + 747^2 .

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

It is a super-2 number, since 2×66151810² = 8752123932552200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66151817) 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 3 ways as a sum of consecutive naturals, for example, 3307581 + ... + 3307600.

Almost surely, 2^66151810 is an apocalyptic number.

66151810 is a deficient number, since it is larger than the sum of its proper divisors (52921466).

66151810 is a wasteful number, since it uses less digits than its factorization.

66151810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615188.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 66151810 is about 8133.3762977007. The cubic root of 66151810 is about 404.4336136108.

Adding to 66151810 its reverse (1815166), we get a palindrome (67966976).

The spelling of 66151810 in words is "sixty-six million, one hundred fifty-one thousand, eight hundred ten".