65980155 has 8 divisors (see below), whose sum is σ = 105568272. Its totient is φ = 35189408.

The previous prime is 65980147. The next prime is 65980157. The reversal of 65980155 is 55108956.

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

It is a cyclic number.

It is not a de Polignac number, because 65980155 - 2³ = 65980147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65980157) 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 7 ways as a sum of consecutive naturals, for example, 2199324 + ... + 2199353.

It is an arithmetic number, because the mean of its divisors is an integer number (13196034).

Almost surely, 2^65980155 is an apocalyptic number.

65980155 is a deficient number, since it is larger than the sum of its proper divisors (39588117).

65980155 is a wasteful number, since it uses less digits than its factorization.

65980155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398685.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 65980155 is about 8122.8169374916. The cubic root of 65980155 is about 404.0834937553.

The spelling of 65980155 in words is "sixty-five million, nine hundred eighty thousand, one hundred fifty-five".