65731066 has 4 divisors (see below), whose sum is σ = 98596602. Its totient is φ = 32865532.

The previous prime is 65731049. The next prime is 65731073. The reversal of 65731066 is 66013756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 1490841 = 8015^2 + 1221^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16432765 + ... + 16432768.

Almost surely, 2^65731066 is an apocalyptic number.

65731066 is a deficient number, since it is larger than the sum of its proper divisors (32865536).

65731066 is a wasteful number, since it uses less digits than its factorization.

65731066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32865535.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 65731066 is about 8107.4697655927. The cubic root of 65731066 is about 403.5743523754.

The spelling of 65731066 in words is "sixty-five million, seven hundred thirty-one thousand, sixty-six".