65949720 has 64 divisors (see below), whose sum is σ = 198443520. Its totient is φ = 17533824.

The previous prime is 65949713. The next prime is 65949739. The reversal of 65949720 is 2794956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54967 + ... + 56153.

It is an arithmetic number, because the mean of its divisors is an integer number (3100680).

Almost surely, 2^65949720 is an apocalyptic number.

65949720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65949720 is an abundant number, since it is smaller than the sum of its proper divisors (132493800).

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

65949720 is a wasteful number, since it uses less digits than its factorization.

65949720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 65949720 is about 8120.9432949627. The cubic root of 65949720 is about 404.0213529870.

The spelling of 65949720 in words is "sixty-five million, nine hundred forty-nine thousand, seven hundred twenty".