65437668 has 36 divisors (see below), whose sum is σ = 172605888. Its totient is φ = 20863920.

The previous prime is 65437663. The next prime is 65437679. The reversal of 65437668 is 86673456.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (65437661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38688 + ... + 40343.

It is an arithmetic number, because the mean of its divisors is an integer number (4794608).

Almost surely, 2^65437668 is an apocalyptic number.

It is an amenable number.

65437668 is an abundant number, since it is smaller than the sum of its proper divisors (107168220).

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

65437668 is a wasteful number, since it uses less digits than its factorization.

65437668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79064 (or 79059 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 65437668 is about 8089.3552277051. The cubic root of 65437668 is about 402.9729902448.

The spelling of 65437668 in words is "sixty-five million, four hundred thirty-seven thousand, six hundred sixty-eight".