1661466305 has 16 divisors (see below), whose sum is σ = 2113809600. Its totient is φ = 1250147520.

The previous prime is 1661466281. The next prime is 1661466311. The reversal of 1661466305 is 5036641661.

It is not a de Polignac number, because 1661466305 - 2²⁰ = 1660417729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49706 + ... + 76115.

It is an arithmetic number, because the mean of its divisors is an integer number (132113100).

Almost surely, 2^1661466305 is an apocalyptic number.

It is an amenable number.

1661466305 is a deficient number, since it is larger than the sum of its proper divisors (452343295).

1661466305 is a wasteful number, since it uses less digits than its factorization.

1661466305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125984.

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

The square root of 1661466305 is about 40761.0881233561. The cubic root of 1661466305 is about 1184.3966746056.

The spelling of 1661466305 in words is "one billion, six hundred sixty-one million, four hundred sixty-six thousand, three hundred five".