65990579 has 2 divisors, whose sum is σ = 65990580. Its totient is φ = 65990578.

The previous prime is 65990569. The next prime is 65990621. The reversal of 65990579 is 97509956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65990579 - 2¹² = 65986483 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65990569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32995289 + 32995290.

It is an arithmetic number, because the mean of its divisors is an integer number (32995290).

Almost surely, 2^65990579 is an apocalyptic number.

65990579 is a deficient number, since it is larger than the sum of its proper divisors (1).

65990579 is an equidigital number, since it uses as much as digits as its factorization.

65990579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 65990579 is about 8123.4585614749. The cubic root of 65990579 is about 404.1047726007.

The spelling of 65990579 in words is "sixty-five million, nine hundred ninety thousand, five hundred seventy-nine".