612065666 has 8 divisors (see below), whose sum is σ = 920745360. Its totient is φ = 305150548.

The previous prime is 612065659. The next prime is 612065681. The reversal of 612065666 is 666560216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440276 + ... + 441663.

It is an arithmetic number, because the mean of its divisors is an integer number (115093170).

Almost surely, 2^612065666 is an apocalyptic number.

612065666 is a deficient number, since it is larger than the sum of its proper divisors (308679694).

612065666 is a wasteful number, since it uses less digits than its factorization.

612065666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882288.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 612065666 is about 24739.9609134695. The cubic root of 612065666 is about 849.0488396125.

The spelling of 612065666 in words is "six hundred twelve million, sixty-five thousand, six hundred sixty-six".