64691707 has 2 divisors, whose sum is σ = 64691708. Its totient is φ = 64691706.

The previous prime is 64691701. The next prime is 64691717. The reversal of 64691707 is 70719646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64691707 - 2¹¹ = 64689659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64691707.

It is not a weakly prime, because it can be changed into another prime (64691701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32345853 + 32345854.

It is an arithmetic number, because the mean of its divisors is an integer number (32345854).

Almost surely, 2^64691707 is an apocalyptic number.

64691707 is a deficient number, since it is larger than the sum of its proper divisors (1).

64691707 is an equidigital number, since it uses as much as digits as its factorization.

64691707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 64691707 is about 8043.1155033358. The cubic root of 64691707 is about 401.4358955919.

The spelling of 64691707 in words is "sixty-four million, six hundred ninety-one thousand, seven hundred seven".