65663642 has 16 divisors (see below), whose sum is σ = 110916864. Its totient is φ = 28884000.

The previous prime is 65663603. The next prime is 65663651. The reversal of 65663642 is 24636656.

It is a junction number, because it is equal to n+sod(n) for n = 65663596 and 65663605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47459 + ... + 48822.

It is an arithmetic number, because the mean of its divisors is an integer number (6932304).

Almost surely, 2^65663642 is an apocalyptic number.

65663642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

65663642 is a deficient number, since it is larger than the sum of its proper divisors (45253222).

65663642 is a wasteful number, since it uses less digits than its factorization.

65663642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96325.

The product of its digits is 155520, while the sum is 38.

The square root of 65663642 is about 8103.3105580374. The cubic root of 65663642 is about 403.4363156352.

The spelling of 65663642 in words is "sixty-five million, six hundred sixty-three thousand, six hundred forty-two".