65197995 has 16 divisors (see below), whose sum is σ = 106862112. Its totient is φ = 33923840.

The previous prime is 65197981. The next prime is 65197999. The reversal of 65197995 is 59979156.

It is a happy number.

It is not a de Polignac number, because 65197995 - 2⁶ = 65197931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65197999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52392 + ... + 53621.

It is an arithmetic number, because the mean of its divisors is an integer number (6678882).

Almost surely, 2^65197995 is an apocalyptic number.

65197995 is a deficient number, since it is larger than the sum of its proper divisors (41664117).

65197995 is a wasteful number, since it uses less digits than its factorization.

65197995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106062.

The product of its digits is 765450, while the sum is 51.

The square root of 65197995 is about 8074.5275403580. The cubic root of 65197995 is about 402.4804100389.

The spelling of 65197995 in words is "sixty-five million, one hundred ninety-seven thousand, nine hundred ninety-five".