64720207 has 16 divisors (see below), whose sum is σ = 70308000. Its totient is φ = 59351040.

The previous prime is 64720171. The next prime is 64720211. The reversal of 64720207 is 70202746.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64720207 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 (64720217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143919 + ... + 144367.

It is an arithmetic number, because the mean of its divisors is an integer number (4394250).

Almost surely, 2^64720207 is an apocalyptic number.

64720207 is a deficient number, since it is larger than the sum of its proper divisors (5587793).

64720207 is a wasteful number, since it uses less digits than its factorization.

64720207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 64720207 is about 8044.8870097721. The cubic root of 64720207 is about 401.4948379399.

The spelling of 64720207 in words is "sixty-four million, seven hundred twenty thousand, two hundred seven".