65077638 has 8 divisors (see below), whose sum is σ = 130155288. Its totient is φ = 21692544.

The previous prime is 65077627. The next prime is 65077651. The reversal of 65077638 is 83677056.

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

65077638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 65077638.

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, 5423131 + ... + 5423142.

It is an arithmetic number, because the mean of its divisors is an integer number (16269411).

Almost surely, 2^65077638 is an apocalyptic number.

65077638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65077638 is a wasteful number, since it uses less digits than its factorization.

65077638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10846278.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 65077638 is about 8067.0712157511. The cubic root of 65077638 is about 402.2325947840.

The spelling of 65077638 in words is "sixty-five million, seventy-seven thousand, six hundred thirty-eight".