65663379 has 10 divisors (see below), whose sum is σ = 98089860. Its totient is φ = 43775532.

The previous prime is 65663369. The next prime is 65663387. The reversal of 65663379 is 97336656.

65663379 is a `hidden beast` number, since 6 + 5 + 6 + 633 + 7 + 9 = 666.

It is not a de Polignac number, because 65663379 - 2⁵ = 65663347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65663369) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 405249 + ... + 405410.

It is an arithmetic number, because the mean of its divisors is an integer number (9808986).

Almost surely, 2^65663379 is an apocalyptic number.

65663379 is a deficient number, since it is larger than the sum of its proper divisors (32426481).

65663379 is an equidigital number, since it uses as much as digits as its factorization.

65663379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810671 (or 810662 counting only the distinct ones).

The product of its digits is 612360, while the sum is 45.

The square root of 65663379 is about 8103.2943300858. The cubic root of 65663379 is about 403.4357770120.

The spelling of 65663379 in words is "sixty-five million, six hundred sixty-three thousand, three hundred seventy-nine".