1651106666 has 8 divisors (see below), whose sum is σ = 2701810944. Its totient is φ = 750503020.

The previous prime is 1651106641. The next prime is 1651106683. The reversal of 1651106666 is 6666011561.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37525130 + ... + 37525173.

It is an arithmetic number, because the mean of its divisors is an integer number (337726368).

Almost surely, 2^1651106666 is an apocalyptic number.

1651106666 is a deficient number, since it is larger than the sum of its proper divisors (1050704278).

1651106666 is a wasteful number, since it uses less digits than its factorization.

1651106666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75050316.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1651106666 is about 40633.8118566299. The cubic root of 1651106666 is about 1181.9298751251.

The spelling of 1651106666 in words is "one billion, six hundred fifty-one million, one hundred six thousand, six hundred sixty-six".