65972745 has 16 divisors (see below), whose sum is σ = 117285120. Its totient is φ = 35185392.

The previous prime is 65972729. The next prime is 65972749. The reversal of 65972745 is 54727956.

It is not a de Polignac number, because 65972745 - 2⁴ = 65972729 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 65972745.

It is not an unprimeable number, because it can be changed into a prime (65972749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244209 + ... + 244478.

It is an arithmetic number, because the mean of its divisors is an integer number (7330320).

Almost surely, 2^65972745 is an apocalyptic number.

It is an amenable number.

65972745 is a deficient number, since it is larger than the sum of its proper divisors (51312375).

65972745 is a wasteful number, since it uses less digits than its factorization.

65972745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488701 (or 488695 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 65972745 is about 8122.3608021314. The cubic root of 65972745 is about 404.0683661220.

The spelling of 65972745 in words is "sixty-five million, nine hundred seventy-two thousand, seven hundred forty-five".