65678461 has 2 divisors, whose sum is σ = 65678462. Its totient is φ = 65678460.

The previous prime is 65678453. The next prime is 65678471. The reversal of 65678461 is 16487656.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 32558436 = 5755^2 + 5706^2 .

It is a cyclic number.

It is not a de Polignac number, because 65678461 - 2³ = 65678453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65678401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32839230 + 32839231.

It is an arithmetic number, because the mean of its divisors is an integer number (32839231).

Almost surely, 2^65678461 is an apocalyptic number.

It is an amenable number.

65678461 is a deficient number, since it is larger than the sum of its proper divisors (1).

65678461 is an equidigital number, since it uses as much as digits as its factorization.

65678461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 65678461 is about 8104.2248858234. The cubic root of 65678461 is about 403.4666625816.

The spelling of 65678461 in words is "sixty-five million, six hundred seventy-eight thousand, four hundred sixty-one".