66424365 has 48 divisors (see below), whose sum is σ = 132158208. Its totient is φ = 30233088.

The previous prime is 66424357. The next prime is 66424381. The reversal of 66424365 is 56342466.

66424365 is a `hidden beast` number, since 6 + 642 + 4 + 3 + 6 + 5 = 666.

It is not a de Polignac number, because 66424365 - 2³ = 66424357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136152 + ... + 136638.

It is an arithmetic number, because the mean of its divisors is an integer number (2753296).

Almost surely, 2^66424365 is an apocalyptic number.

It is an amenable number.

66424365 is a deficient number, since it is larger than the sum of its proper divisors (65733843).

66424365 is a wasteful number, since it uses less digits than its factorization.

66424365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 935 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66424365 is about 8150.1144163748. The cubic root of 66424365 is about 404.9882941290.

The spelling of 66424365 in words is "sixty-six million, four hundred twenty-four thousand, three hundred sixty-five".