65198077 has 48 divisors (see below), whose sum is σ = 86873472. Its totient is φ = 48491520.

The previous prime is 65198069. The next prime is 65198083. The reversal of 65198077 is 77089156.

It is not a de Polignac number, because 65198077 - 2³ = 65198069 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65198017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 785478 + ... + 785560.

It is an arithmetic number, because the mean of its divisors is an integer number (1809864).

Almost surely, 2^65198077 is an apocalyptic number.

It is an amenable number.

65198077 is a deficient number, since it is larger than the sum of its proper divisors (21675395).

65198077 is a wasteful number, since it uses less digits than its factorization.

65198077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 65198077 is about 8074.5326180529. The cubic root of 65198077 is about 402.4805787731.

The spelling of 65198077 in words is "sixty-five million, one hundred ninety-eight thousand, seventy-seven".