64722073 has 8 divisors (see below), whose sum is σ = 70164416. Its totient is φ = 59346000.

The previous prime is 64722059. The next prime is 64722083. The reversal of 64722073 is 37022746.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64722073 - 2⁹ = 64721561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64722083) 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, 14523 + ... + 18448.

It is an arithmetic number, because the mean of its divisors is an integer number (8770552).

Almost surely, 2^64722073 is an apocalyptic number.

It is an amenable number.

64722073 is a deficient number, since it is larger than the sum of its proper divisors (5442343).

64722073 is a wasteful number, since it uses less digits than its factorization.

64722073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33135.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 64722073 is about 8045.0029832188. The cubic root of 64722073 is about 401.4986965090.

The spelling of 64722073 in words is "sixty-four million, seven hundred twenty-two thousand, seventy-three".