65326778 has 16 divisors (see below), whose sum is σ = 107191296. Its totient is φ = 29612640.

The previous prime is 65326771. The next prime is 65326783. The reversal of 65326778 is 87762356.

It is a super-2 number, since 2×65326778² = 8535175847722568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65326771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4550 + ... + 12302.

It is an arithmetic number, because the mean of its divisors is an integer number (6699456).

Almost surely, 2^65326778 is an apocalyptic number.

65326778 is a deficient number, since it is larger than the sum of its proper divisors (41864518).

65326778 is a wasteful number, since it uses less digits than its factorization.

65326778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8149.

The product of its digits is 423360, while the sum is 44.

The square root of 65326778 is about 8082.4982523970. The cubic root of 65326778 is about 402.7452369169.

The spelling of 65326778 in words is "sixty-five million, three hundred twenty-six thousand, seven hundred seventy-eight".