65978707 has 2 divisors, whose sum is σ = 65978708. Its totient is φ = 65978706.

The previous prime is 65978701. The next prime is 65978723. The reversal of 65978707 is 70787956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65978707 - 2¹⁹ = 65454419 is a prime.

It is not a weakly prime, because it can be changed into another prime (65978701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32989353 + 32989354.

It is an arithmetic number, because the mean of its divisors is an integer number (32989354).

Almost surely, 2^65978707 is an apocalyptic number.

65978707 is a deficient number, since it is larger than the sum of its proper divisors (1).

65978707 is an equidigital number, since it uses as much as digits as its factorization.

65978707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 65978707 is about 8122.7278053619. The cubic root of 65978707 is about 404.0805377292.

Subtracting 65978707 from its reverse (70787956), we obtain a square (4809249 = 2193²).

The spelling of 65978707 in words is "sixty-five million, nine hundred seventy-eight thousand, seven hundred seven".