616819966 has 16 divisors (see below), whose sum is σ = 1093868640. Its totient is φ = 255235680.

The previous prime is 616819939. The next prime is 616819967. The reversal of 616819966 is 669918616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616819967) 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, 759225 + ... + 760036.

It is an arithmetic number, because the mean of its divisors is an integer number (68366790).

Almost surely, 2^616819966 is an apocalyptic number.

616819966 is a deficient number, since it is larger than the sum of its proper divisors (477048674).

616819966 is a wasteful number, since it uses less digits than its factorization.

616819966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519299.

The product of its digits is 839808, while the sum is 52.

The square root of 616819966 is about 24835.8604843883. The cubic root of 616819966 is about 851.2415379351.

The spelling of 616819966 in words is "six hundred sixteen million, eight hundred nineteen thousand, nine hundred sixty-six".