66040382 has 4 divisors (see below), whose sum is σ = 99060576. Its totient is φ = 33020190.

The previous prime is 66040363. The next prime is 66040417. The reversal of 66040382 is 28304066.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66040382² = 8722664109411848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510094 + ... + 16510097.

It is an arithmetic number, because the mean of its divisors is an integer number (24765144).

Almost surely, 2^66040382 is an apocalyptic number.

66040382 is a deficient number, since it is larger than the sum of its proper divisors (33020194).

66040382 is a wasteful number, since it uses less digits than its factorization.

66040382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33020193.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 66040382 is about 8126.5233648837. The cubic root of 66040382 is about 404.2064061444.

The spelling of 66040382 in words is "sixty-six million, forty thousand, three hundred eighty-two".