65664042 has 16 divisors (see below), whose sum is σ = 134531712. Its totient is φ = 21354080.

The previous prime is 65664041. The next prime is 65664043. The reversal of 65664042 is 24046656.

It is an interprime number because it is at equal distance from previous prime (65664041) and next prime (65664043).

It is a junction number, because it is equal to n+sod(n) for n = 65663994 and 65664012.

It is not an unprimeable number, because it can be changed into a prime (65664041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133218 + ... + 133709.

It is an arithmetic number, because the mean of its divisors is an integer number (8408232).

Almost surely, 2^65664042 is an apocalyptic number.

65664042 is an abundant number, since it is smaller than the sum of its proper divisors (68867670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65664042 is a wasteful number, since it uses less digits than its factorization.

65664042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266973.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 65664042 is about 8103.3352392703. The cubic root of 65664042 is about 403.4371348313.

The spelling of 65664042 in words is "sixty-five million, six hundred sixty-four thousand, forty-two".