65618420 has 24 divisors (see below), whose sum is σ = 157484544. Its totient is φ = 22497696.

The previous prime is 65618417. The next prime is 65618429. The reversal of 65618420 is 2481656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65618429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234212 + ... + 234491.

It is an arithmetic number, because the mean of its divisors is an integer number (6561856).

Almost surely, 2^65618420 is an apocalyptic number.

It is an amenable number.

65618420 is an abundant number, since it is smaller than the sum of its proper divisors (91866124).

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

65618420 is a wasteful number, since it uses less digits than its factorization.

65618420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468719 (or 468717 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 65618420 is about 8100.5197364120. The cubic root of 65618420 is about 403.3436799629.

The spelling of 65618420 in words is "sixty-five million, six hundred eighteen thousand, four hundred twenty".