65949930 has 64 divisors (see below), whose sum is σ = 179642880. Its totient is φ = 17209152.

The previous prime is 65949907. The next prime is 65949991. The reversal of 65949930 is 3994956.

It is a happy number.

It is a super-3 number, since 3×65949930³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10092 + ... + 15288.

It is an arithmetic number, because the mean of its divisors is an integer number (2806920).

Almost surely, 2^65949930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65949930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89821440).

65949930 is an abundant number, since it is smaller than the sum of its proper divisors (113692950).

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

65949930 is a wasteful number, since it uses less digits than its factorization.

65949930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260 (or 5254 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 65949930 is about 8120.9562244849. The cubic root of 65949930 is about 404.0217818207.

The spelling of 65949930 in words is "sixty-five million, nine hundred forty-nine thousand, nine hundred thirty".