616661211 has 8 divisors (see below), whose sum is σ = 857963520. Its totient is φ = 393233192.

The previous prime is 616661189. The next prime is 616661239. The reversal of 616661211 is 112166616.

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

It is a cyclic number.

It is not a de Polignac number, because 616661211 - 2⁹ = 616660699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616661011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4468491 + ... + 4468628.

It is an arithmetic number, because the mean of its divisors is an integer number (107245440).

Almost surely, 2^616661211 is an apocalyptic number.

616661211 is a deficient number, since it is larger than the sum of its proper divisors (241302309).

616661211 is a wasteful number, since it uses less digits than its factorization.

616661211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937145.

The product of its digits is 2592, while the sum is 30.

The square root of 616661211 is about 24832.6641945644. The cubic root of 616661211 is about 851.1685017964.

The spelling of 616661211 in words is "six hundred sixteen million, six hundred sixty-one thousand, two hundred eleven".