64670657 has 2 divisors, whose sum is σ = 64670658. Its totient is φ = 64670656.

The previous prime is 64670647. The next prime is 64670677. The reversal of 64670657 is 75607646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51825601 + 12845056 = 7199^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 64670657 - 2¹² = 64666561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64670647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32335328 + 32335329.

It is an arithmetic number, because the mean of its divisors is an integer number (32335329).

Almost surely, 2^64670657 is an apocalyptic number.

It is an amenable number.

64670657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64670657 is an equidigital number, since it uses as much as digits as its factorization.

64670657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 64670657 is about 8041.8068243399. The cubic root of 64670657 is about 401.3923498645.

The spelling of 64670657 in words is "sixty-four million, six hundred seventy thousand, six hundred fifty-seven".