65671951 has 2 divisors, whose sum is σ = 65671952. Its totient is φ = 65671950.

The previous prime is 65671927. The next prime is 65671987. The reversal of 65671951 is 15917656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65671951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65671351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32835975 + 32835976.

It is an arithmetic number, because the mean of its divisors is an integer number (32835976).

Almost surely, 2^65671951 is an apocalyptic number.

65671951 is a deficient number, since it is larger than the sum of its proper divisors (1).

65671951 is an equidigital number, since it uses as much as digits as its factorization.

65671951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 65671951 is about 8103.8232335115. The cubic root of 65671951 is about 403.4533317031.

The spelling of 65671951 in words is "sixty-five million, six hundred seventy-one thousand, nine hundred fifty-one".