1661466606 has 8 divisors (see below), whose sum is σ = 3322933224. Its totient is φ = 553822200.

The previous prime is 1661466601. The next prime is 1661466613. The reversal of 1661466606 is 6066641661.

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

1661466606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661466601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138455545 + ... + 138455556.

It is an arithmetic number, because the mean of its divisors is an integer number (415366653).

Almost surely, 2^1661466606 is an apocalyptic number.

1661466606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661466606 is a wasteful number, since it uses less digits than its factorization.

1661466606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276911106.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 1661466606 is about 40761.0918156028. The cubic root of 1661466606 is about 1184.3967461295.

The spelling of 1661466606 in words is "one billion, six hundred sixty-one million, four hundred sixty-six thousand, six hundred six".