64972165 has 8 divisors (see below), whose sum is σ = 78317568. Its totient is φ = 51743760.

The previous prime is 64972163. The next prime is 64972199. The reversal of 64972165 is 56127946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64972165 - 2¹ = 64972163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64972163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28021 + ... + 30250.

It is an arithmetic number, because the mean of its divisors is an integer number (9789696).

Almost surely, 2^64972165 is an apocalyptic number.

It is an amenable number.

64972165 is a deficient number, since it is larger than the sum of its proper divisors (13345403).

64972165 is a wasteful number, since it uses less digits than its factorization.

64972165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58499.

The product of its digits is 90720, while the sum is 40.

The square root of 64972165 is about 8060.5313100316. The cubic root of 64972165 is about 402.0151743816.

The spelling of 64972165 in words is "sixty-four million, nine hundred seventy-two thousand, one hundred sixty-five".