66402441 has 12 divisors (see below), whose sum is σ = 109616832. Its totient is φ = 37944216.

The previous prime is 66402439. The next prime is 66402461. The reversal of 66402441 is 14420466.

It is not a de Polignac number, because 66402441 - 2¹ = 66402439 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66402461) 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, 526941 + ... + 527066.

It is an arithmetic number, because the mean of its divisors is an integer number (9134736).

Almost surely, 2^66402441 is an apocalyptic number.

It is an amenable number.

66402441 is a deficient number, since it is larger than the sum of its proper divisors (43214391).

66402441 is a wasteful number, since it uses less digits than its factorization.

66402441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054020 (or 1054017 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 66402441 is about 8148.7692935805. The cubic root of 66402441 is about 404.9437324665.

The spelling of 66402441 in words is "sixty-six million, four hundred two thousand, four hundred forty-one".