611661616 has 40 divisors (see below), whose sum is σ = 1221015600. Its totient is φ = 296647680.

The previous prime is 611661569. The next prime is 611661637. The reversal of 611661616 is 616166116.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114820 + ... + 120028.

It is an arithmetic number, because the mean of its divisors is an integer number (30525390).

Almost surely, 2^611661616 is an apocalyptic number.

It is an amenable number.

611661616 is a deficient number, since it is larger than the sum of its proper divisors (609353984).

611661616 is a wasteful number, since it uses less digits than its factorization.

611661616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437 (or 5431 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 611661616 is about 24731.7936268278. The cubic root of 611661616 is about 848.8619676697.

The spelling of 611661616 in words is "six hundred eleven million, six hundred sixty-one thousand, six hundred sixteen".