65216890 has 8 divisors (see below), whose sum is σ = 117390420. Its totient is φ = 26086752.

The previous prime is 65216867. The next prime is 65216897. The reversal of 65216890 is 9861256.

It can be written as a sum of positive squares in 2 ways, for example, as 64979721 + 237169 = 8061^2 + 487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (65216897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3260835 + ... + 3260854.

Almost surely, 2^65216890 is an apocalyptic number.

65216890 is a deficient number, since it is larger than the sum of its proper divisors (52173530).

65216890 is a wasteful number, since it uses less digits than its factorization.

65216890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521696.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 65216890 is about 8075.6974930962. The cubic root of 65216890 is about 402.5192871691.

The spelling of 65216890 in words is "sixty-five million, two hundred sixteen thousand, eight hundred ninety".