65761240 has 16 divisors (see below), whose sum is σ = 147962880. Its totient is φ = 26304480.

The previous prime is 65761231. The next prime is 65761271. The reversal of 65761240 is 4216756.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821976 + ... + 822055.

It is an arithmetic number, because the mean of its divisors is an integer number (9247680).

Almost surely, 2^65761240 is an apocalyptic number.

It is an amenable number.

65761240 is an abundant number, since it is smaller than the sum of its proper divisors (82201640).

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

65761240 is a wasteful number, since it uses less digits than its factorization.

65761240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644042 (or 1644038 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 65761240 is about 8109.3304285866. The cubic root of 65761240 is about 403.6360968461.

Adding to 65761240 its reverse (4216756), we get a palindrome (69977996).

The spelling of 65761240 in words is "sixty-five million, seven hundred sixty-one thousand, two hundred forty".