610001666 has 8 divisors (see below), whose sum is σ = 919793664. Its totient is φ = 303403780.

The previous prime is 610001659. The next prime is 610001687. The reversal of 610001666 is 666100016.

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, 798050 + ... + 798813.

It is an arithmetic number, because the mean of its divisors is an integer number (114974208).

Almost surely, 2^610001666 is an apocalyptic number.

610001666 is a deficient number, since it is larger than the sum of its proper divisors (309791998).

610001666 is a wasteful number, since it uses less digits than its factorization.

610001666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597056.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 610001666 is about 24698.2117976181. The cubic root of 610001666 is about 848.0933809368.

The spelling of 610001666 in words is "six hundred ten million, one thousand, six hundred sixty-six".