616661650 has 24 divisors (see below), whose sum is σ = 1251263664. Its totient is φ = 224240400.

The previous prime is 616661629. The next prime is 616661653. The reversal of 616661650 is 56166616.

It is not an unprimeable number, because it can be changed into a prime (616661653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560052 + ... + 561151.

It is an arithmetic number, because the mean of its divisors is an integer number (52135986).

Almost surely, 2^616661650 is an apocalyptic number.

616661650 is an abundant number, since it is smaller than the sum of its proper divisors (634602014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616661650 is a wasteful number, since it uses less digits than its factorization.

616661650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121226 (or 1121221 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 616661650 is about 24832.6730337272. The cubic root of 616661650 is about 851.1687037781.

It can be divided in two parts, 616 and 661650, that added together give a palindrome (662266).

The spelling of 616661650 in words is "six hundred sixteen million, six hundred sixty-one thousand, six hundred fifty".