65645442 has 24 divisors (see below), whose sum is σ = 143024700. Its totient is φ = 21759840.

The previous prime is 65645441. The next prime is 65645443. The reversal of 65645442 is 24454656.

65645442 is a `hidden beast` number, since 6 + 5 + 645 + 4 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (65645441) and next prime (65645443).

It can be written as a sum of positive squares in 2 ways, for example, as 57471561 + 8173881 = 7581^2 + 2859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65645397 and 65645406.

It is not an unprimeable number, because it can be changed into a prime (65645441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6817 + ... + 13332.

Almost surely, 2^65645442 is an apocalyptic number.

65645442 is an abundant number, since it is smaller than the sum of its proper divisors (77379258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65645442 is a wasteful number, since it uses less digits than its factorization.

65645442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20338 (or 20335 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 65645442 is about 8102.1874824025. The cubic root of 65645442 is about 403.3990386927.

The spelling of 65645442 in words is "sixty-five million, six hundred forty-five thousand, four hundred forty-two".