4661215666 has 8 divisors (see below), whose sum is σ = 6992675244. Its totient is φ = 2330323920.

The previous prime is 4661215651. The next prime is 4661215693. The reversal of 4661215666 is 6665121664.

It can be written as a sum of positive squares in 2 ways, for example, as 4660929441 + 286225 = 68271^2 + 535^2 .

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, 120805 + ... + 154648.

Almost surely, 2^4661215666 is an apocalyptic number.

4661215666 is a deficient number, since it is larger than the sum of its proper divisors (2331459578).

4661215666 is a wasteful number, since it uses less digits than its factorization.

4661215666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283916.

The product of its digits is 311040, while the sum is 43.

The square root of 4661215666 is about 68273.0962092683. The cubic root of 4661215666 is about 1670.4484036203.

The spelling of 4661215666 in words is "four billion, six hundred sixty-one million, two hundred fifteen thousand, six hundred sixty-six".