65990736 has 120 divisors (see below), whose sum is σ = 223539264. Its totient is φ = 17740800.

The previous prime is 65990731. The next prime is 65990783. The reversal of 65990736 is 63709956.

It is a junction number, because it is equal to n+sod(n) for n = 65990691 and 65990700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65990731) 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, 15211 + ... + 19061.

Almost surely, 2^65990736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65990736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111769632).

65990736 is an abundant number, since it is smaller than the sum of its proper divisors (157548528).

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

65990736 is a wasteful number, since it uses less digits than its factorization.

65990736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889 (or 3880 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 65990736 is about 8123.4682248409. The cubic root of 65990736 is about 404.1050930727.

The spelling of 65990736 in words is "sixty-five million, nine hundred ninety thousand, seven hundred thirty-six".