65491378 has 8 divisors (see below), whose sum is σ = 104015772. Its totient is φ = 30819456.

The previous prime is 65491339. The next prime is 65491381. The reversal of 65491378 is 87319456.

It can be written as a sum of positive squares in 2 ways, for example, as 65399569 + 91809 = 8087^2 + 303^2 .

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

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, 963075 + ... + 963142.

Almost surely, 2^65491378 is an apocalyptic number.

65491378 is a deficient number, since it is larger than the sum of its proper divisors (38524394).

65491378 is a wasteful number, since it uses less digits than its factorization.

65491378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926236.

The product of its digits is 181440, while the sum is 43.

The square root of 65491378 is about 8092.6743416500. The cubic root of 65491378 is about 403.0832109637.

The spelling of 65491378 in words is "sixty-five million, four hundred ninety-one thousand, three hundred seventy-eight".