65191340 has 12 divisors (see below), whose sum is σ = 136901856. Its totient is φ = 26076528.

The previous prime is 65191339. The next prime is 65191349. The reversal of 65191340 is 4319156.

It is not an unprimeable number, because it can be changed into a prime (65191349) 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, 1629764 + ... + 1629803.

It is an arithmetic number, because the mean of its divisors is an integer number (11408488).

Almost surely, 2^65191340 is an apocalyptic number.

It is an amenable number.

65191340 is an abundant number, since it is smaller than the sum of its proper divisors (71710516).

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

65191340 is a wasteful number, since it uses less digits than its factorization.

65191340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259576 (or 3259574 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 65191340 is about 8074.1154314265. The cubic root of 65191340 is about 402.4667153526.

The spelling of 65191340 in words is "sixty-five million, one hundred ninety-one thousand, three hundred forty".