65091772 has 6 divisors (see below), whose sum is σ = 113910608. Its totient is φ = 32545884.

The previous prime is 65091751. The next prime is 65091779. The reversal of 65091772 is 27719056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65091779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8136468 + ... + 8136475.

Almost surely, 2^65091772 is an apocalyptic number.

It is an amenable number.

65091772 is a deficient number, since it is larger than the sum of its proper divisors (48818836).

65091772 is a wasteful number, since it uses less digits than its factorization.

65091772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16272947 (or 16272945 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 65091772 is about 8067.9471986373. The cubic root of 65091772 is about 402.2617125380.

It can be divided in two parts, 6509 and 1772, that added together give a square (8281 = 91²).

The spelling of 65091772 in words is "sixty-five million, ninety-one thousand, seven hundred seventy-two".