65854891 has 2 divisors, whose sum is σ = 65854892. Its totient is φ = 65854890.

The previous prime is 65854861. The next prime is 65854907. The reversal of 65854891 is 19845856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65854891 - 2¹⁵ = 65822123 is a prime.

It is not a weakly prime, because it can be changed into another prime (65854861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32927445 + 32927446.

It is an arithmetic number, because the mean of its divisors is an integer number (32927446).

Almost surely, 2^65854891 is an apocalyptic number.

65854891 is a deficient number, since it is larger than the sum of its proper divisors (1).

65854891 is an equidigital number, since it uses as much as digits as its factorization.

65854891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The square root of 65854891 is about 8115.1026487654. The cubic root of 65854891 is about 403.8276128724.

It can be divided in two parts, 6585 and 4891, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 65854891 in words is "sixty-five million, eight hundred fifty-four thousand, eight hundred ninety-one".