66363428 has 24 divisors (see below), whose sum is σ = 122512320. Its totient is φ = 31367520.

The previous prime is 66363419. The next prime is 66363439. The reversal of 66363428 is 82436366.

It is a super-2 number, since 2×66363428² = 8808209151822368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 66363391 and 66363400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62018 + ... + 63078.

It is an arithmetic number, because the mean of its divisors is an integer number (5104680).

Almost surely, 2^66363428 is an apocalyptic number.

It is an amenable number.

66363428 is a deficient number, since it is larger than the sum of its proper divisors (56148892).

66363428 is a wasteful number, since it uses less digits than its factorization.

66363428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1905 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 66363428 is about 8146.3751448113. The cubic root of 66363428 is about 404.8644122662.

The spelling of 66363428 in words is "sixty-six million, three hundred sixty-three thousand, four hundred twenty-eight".