616662641 has 16 divisors (see below), whose sum is σ = 771949440. Its totient is φ = 480318720.

The previous prime is 616662617. The next prime is 616662647. The reversal of 616662641 is 146266616.

It is a de Polignac number, because none of the positive numbers 2^k-616662641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616662595 and 616662604.

It is not an unprimeable number, because it can be changed into a prime (616662647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85895 + ... + 92796.

It is an arithmetic number, because the mean of its divisors is an integer number (48246840).

Almost surely, 2^616662641 is an apocalyptic number.

It is an amenable number.

616662641 is a deficient number, since it is larger than the sum of its proper divisors (155286799).

616662641 is a wasteful number, since it uses less digits than its factorization.

616662641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178744.

The product of its digits is 62208, while the sum is 38.

The square root of 616662641 is about 24832.6929872698. The cubic root of 616662641 is about 851.1691597319.

The spelling of 616662641 in words is "six hundred sixteen million, six hundred sixty-two thousand, six hundred forty-one".