65671897 has 4 divisors (see below), whose sum is σ = 66785040. Its totient is φ = 64558756.

The previous prime is 65671849. The next prime is 65671913. The reversal of 65671897 is 79817656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65671897 - 2⁷ = 65671769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65671897.

It is not an unprimeable number, because it can be changed into a prime (65671817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556483 + ... + 556600.

It is an arithmetic number, because the mean of its divisors is an integer number (16696260).

Almost surely, 2^65671897 is an apocalyptic number.

It is an amenable number.

65671897 is a deficient number, since it is larger than the sum of its proper divisors (1113143).

65671897 is a wasteful number, since it uses less digits than its factorization.

65671897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113142.

The product of its digits is 635040, while the sum is 49.

The square root of 65671897 is about 8103.8199017500. The cubic root of 65671897 is about 403.4532211207.

It can be divided in two parts, 6567 and 1897, that added together give a square (8464 = 92²).

The spelling of 65671897 in words is "sixty-five million, six hundred seventy-one thousand, eight hundred ninety-seven".