616660653 has 8 divisors (see below), whose sum is σ = 939673408. Its totient is φ = 352377504.

The previous prime is 616660621. The next prime is 616660661. The reversal of 616660653 is 356066616.

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

It is not a de Polignac number, because 616660653 - 2⁵ = 616660621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616660663) 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, 14682376 + ... + 14682417.

It is an arithmetic number, because the mean of its divisors is an integer number (117459176).

Almost surely, 2^616660653 is an apocalyptic number.

It is an amenable number.

616660653 is a deficient number, since it is larger than the sum of its proper divisors (323012755).

616660653 is a wasteful number, since it uses less digits than its factorization.

616660653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29364803.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 616660653 is about 24832.6529593598. The cubic root of 616660653 is about 851.1682450632.

The spelling of 616660653 in words is "six hundred sixteen million, six hundred sixty thousand, six hundred fifty-three".