65749830 has 32 divisors (see below), whose sum is σ = 158022144. Its totient is φ = 17508576.

The previous prime is 65749811. The next prime is 65749837. The reversal of 65749830 is 3894756.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65749837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32097 + ... + 34083.

It is an arithmetic number, because the mean of its divisors is an integer number (4938192).

Almost surely, 2^65749830 is an apocalyptic number.

65749830 is an abundant number, since it is smaller than the sum of its proper divisors (92272314).

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

65749830 is a wasteful number, since it uses less digits than its factorization.

65749830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 65749830 is about 8108.6268874576. The cubic root of 65749830 is about 403.6127510056.

The spelling of 65749830 in words is "sixty-five million, seven hundred forty-nine thousand, eight hundred thirty".