61327664 has 20 divisors (see below), whose sum is σ = 118954440. Its totient is φ = 30629760.

The previous prime is 61327661. The next prime is 61327667. The reversal of 61327664 is 46672316.

61327664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61327661) and next prime (61327667).

It is a super-2 number, since 2×61327664² = 7522164743393792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61327661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19172 + ... + 22140.

It is an arithmetic number, because the mean of its divisors is an integer number (5947722).

Almost surely, 2^61327664 is an apocalyptic number.

It is an amenable number.

61327664 is a deficient number, since it is larger than the sum of its proper divisors (57626776).

61327664 is a wasteful number, since it uses less digits than its factorization.

61327664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268 (or 4262 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 61327664 is about 7831.1981203389. The cubic root of 61327664 is about 394.3532952442.

The spelling of 61327664 in words is "sixty-one million, three hundred twenty-seven thousand, six hundred sixty-four".