65618066 has 8 divisors (see below), whose sum is σ = 100040844. Its totient is φ = 32271120.

The previous prime is 65618029. The next prime is 65618087. The reversal of 65618066 is 66081656.

It can be written as a sum of positive squares in 2 ways, for example, as 59737441 + 5880625 = 7729^2 + 2425^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268805 + ... + 269048.

Almost surely, 2^65618066 is an apocalyptic number.

65618066 is a deficient number, since it is larger than the sum of its proper divisors (34422778).

65618066 is a wasteful number, since it uses less digits than its factorization.

65618066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537916.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 65618066 is about 8100.4978859327. The cubic root of 65618066 is about 403.3429546385.

The spelling of 65618066 in words is "sixty-five million, six hundred eighteen thousand, sixty-six".