65778422 has 4 divisors (see below), whose sum is σ = 98667636. Its totient is φ = 32889210.

The previous prime is 65778407. The next prime is 65778431. The reversal of 65778422 is 22487756.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65778422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16444604 + ... + 16444607.

It is an arithmetic number, because the mean of its divisors is an integer number (24666909).

Almost surely, 2^65778422 is an apocalyptic number.

65778422 is a deficient number, since it is larger than the sum of its proper divisors (32889214).

65778422 is a wasteful number, since it uses less digits than its factorization.

65778422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32889213.

The product of its digits is 188160, while the sum is 41.

The square root of 65778422 is about 8110.3897563557. The cubic root of 65778422 is about 403.6712476000.

The spelling of 65778422 in words is "sixty-five million, seven hundred seventy-eight thousand, four hundred twenty-two".