65499900 has 72 divisors (see below), whose sum is σ = 195654144. Its totient is φ = 16900800.

The previous prime is 65499899. The next prime is 65499901. The reversal of 65499900 is 999456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65499899) and next prime (65499901).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65499901) 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, 5779 + ... + 12821.

Almost surely, 2^65499900 is an apocalyptic number.

65499900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65499900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97827072).

65499900 is an abundant number, since it is smaller than the sum of its proper divisors (130154244).

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

65499900 is a wasteful number, since it uses less digits than its factorization.

65499900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091 (or 7084 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 65499900 is about 8093.2008500963. The cubic root of 65499900 is about 403.1006938052.

The spelling of 65499900 in words is "sixty-five million, four hundred ninety-nine thousand, nine hundred".