65770331 has 16 divisors (see below), whose sum is σ = 76295520. Its totient is φ = 56227840.

The previous prime is 65770321. The next prime is 65770333. The reversal of 65770331 is 13307756.

It is a de Polignac number, because none of the positive numbers 2^k-65770331 is a prime.

It is a super-2 number, since 2×65770331² = 8651472879699122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65770333) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53435 + ... + 54651.

It is an arithmetic number, because the mean of its divisors is an integer number (4768470).

Almost surely, 2^65770331 is an apocalyptic number.

65770331 is a deficient number, since it is larger than the sum of its proper divisors (10525189).

65770331 is a wasteful number, since it uses less digits than its factorization.

65770331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 65770331 is about 8109.8909363813. The cubic root of 65770331 is about 403.6546958804.

The spelling of 65770331 in words is "sixty-five million, seven hundred seventy thousand, three hundred thirty-one".