65499678 has 48 divisors (see below), whose sum is σ = 147987840. Its totient is φ = 21712536.

The previous prime is 65499677. The next prime is 65499689. The reversal of 65499678 is 87699456.

65499678 is a `hidden beast` number, since 6 + 549 + 96 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65499677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148983 + ... + 149421.

It is an arithmetic number, because the mean of its divisors is an integer number (3083080).

Almost surely, 2^65499678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65499678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73993920).

65499678 is an abundant number, since it is smaller than the sum of its proper divisors (82488162).

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

65499678 is a wasteful number, since it uses less digits than its factorization.

65499678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 751 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 65499678 is about 8093.1871348684. The cubic root of 65499678 is about 403.1002383925.

The spelling of 65499678 in words is "sixty-five million, four hundred ninety-nine thousand, six hundred seventy-eight".