65011970 has 32 divisors (see below), whose sum is σ = 119764656. Its totient is φ = 25401600.

The previous prime is 65011963. The next prime is 65011981. The reversal of 65011970 is 7911056.

It is a happy number.

It is a Cunningham number, because it is equal to 8063²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 25836889 + 39175081 = 5083^2 + 6259^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119900 + ... + 120440.

Almost surely, 2^65011970 is an apocalyptic number.

65011970 is a deficient number, since it is larger than the sum of its proper divisors (54752686).

65011970 is a wasteful number, since it uses less digits than its factorization.

65011970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 65011970 is about 8063.0000620117. Note that the first 4 decimals coincide. The cubic root of 65011970 is about 402.0972554144.

The spelling of 65011970 in words is "sixty-five million, eleven thousand, nine hundred seventy".