64961705 has 4 divisors (see below), whose sum is σ = 77954052. Its totient is φ = 51969360.

The previous prime is 64961651. The next prime is 64961713. The reversal of 64961705 is 50716946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40081561 + 24880144 = 6331^2 + 4988^2 .

It is not a de Polignac number, because 64961705 - 2¹⁰ = 64960681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6496166 + ... + 6496175.

It is an arithmetic number, because the mean of its divisors is an integer number (19488513).

Almost surely, 2^64961705 is an apocalyptic number.

It is an amenable number.

64961705 is a deficient number, since it is larger than the sum of its proper divisors (12992347).

64961705 is a wasteful number, since it uses less digits than its factorization.

64961705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992346.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 64961705 is about 8059.8824433114. The cubic root of 64961705 is about 401.9935994790.

The spelling of 64961705 in words is "sixty-four million, nine hundred sixty-one thousand, seven hundred five".