65970945 has 72 divisors (see below), whose sum is σ = 125528832. Its totient is φ = 32011200.

The previous prime is 65970943. The next prime is 65970953. The reversal of 65970945 is 54907956.

It is a happy number.

65970945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65970945 - 2¹ = 65970943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65970945.

It is not an unprimeable number, because it can be changed into a prime (65970941) 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 71 ways as a sum of consecutive naturals, for example, 503530 + ... + 503660.

It is an arithmetic number, because the mean of its divisors is an integer number (1743456).

Almost surely, 2^65970945 is an apocalyptic number.

It is an amenable number.

65970945 is a deficient number, since it is larger than the sum of its proper divisors (59557887).

65970945 is a wasteful number, since it uses less digits than its factorization.

65970945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 65970945 is about 8122.2499961525. The cubic root of 65970945 is about 404.0646912222.

The spelling of 65970945 in words is "sixty-five million, nine hundred seventy thousand, nine hundred forty-five".