616661307 has 24 divisors (see below), whose sum is σ = 938854800. Its totient is φ = 389433408.

The previous prime is 616661239. The next prime is 616661317. The reversal of 616661307 is 703166616.

It is not a de Polignac number, because 616661307 - 2²² = 612467003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616661317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8457 + ... + 36122.

It is an arithmetic number, because the mean of its divisors is an integer number (39118950).

Almost surely, 2^616661307 is an apocalyptic number.

616661307 is a deficient number, since it is larger than the sum of its proper divisors (322193493).

616661307 is a wasteful number, since it uses less digits than its factorization.

616661307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44667 (or 44664 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 616661307 is about 24832.6661275023. Note that the first 3 decimals coincide. The cubic root of 616661307 is about 851.1685459655.

The spelling of 616661307 in words is "six hundred sixteen million, six hundred sixty-one thousand, three hundred seven".