65720349 has 8 divisors (see below), whose sum is σ = 97363520. Its totient is φ = 43813548.

The previous prime is 65720339. The next prime is 65720353. The reversal of 65720349 is 94302756.

It is not a de Polignac number, because 65720349 - 2¹² = 65716253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65720329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217017 + ... + 1217070.

It is an arithmetic number, because the mean of its divisors is an integer number (12170440).

Almost surely, 2^65720349 is an apocalyptic number.

It is an amenable number.

65720349 is a deficient number, since it is larger than the sum of its proper divisors (31643171).

65720349 is a wasteful number, since it uses less digits than its factorization.

65720349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434096 (or 2434090 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 65720349 is about 8106.8088049491. The cubic root of 65720349 is about 403.5524178389.

The spelling of 65720349 in words is "sixty-five million, seven hundred twenty thousand, three hundred forty-nine".