64672061 has 2 divisors, whose sum is σ = 64672062. Its totient is φ = 64672060.

The previous prime is 64672051. The next prime is 64672079. The reversal of 64672061 is 16027646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 11600836 = 7285^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 64672061 - 2¹⁰ = 64671037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64672051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32336030 + 32336031.

It is an arithmetic number, because the mean of its divisors is an integer number (32336031).

Almost surely, 2^64672061 is an apocalyptic number.

It is an amenable number.

64672061 is a deficient number, since it is larger than the sum of its proper divisors (1).

64672061 is an equidigital number, since it uses as much as digits as its factorization.

64672061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 64672061 is about 8041.8941176815. The cubic root of 64672061 is about 401.3952545862.

The spelling of 64672061 in words is "sixty-four million, six hundred seventy-two thousand, sixty-one".