660161650 has 48 divisors (see below), whose sum is σ = 1295854560. Its totient is φ = 249523200.

The previous prime is 660161633. The next prime is 660161651. The reversal of 660161650 is 56161066.

It is not an unprimeable number, because it can be changed into a prime (660161651) 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, 541842 + ... + 543058.

It is an arithmetic number, because the mean of its divisors is an integer number (26996970).

Almost surely, 2^660161650 is an apocalyptic number.

660161650 is a deficient number, since it is larger than the sum of its proper divisors (635692910).

660161650 is a wasteful number, since it uses less digits than its factorization.

660161650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 660161650 is about 25693.6110735724. The cubic root of 660161650 is about 870.7298451281.

The spelling of 660161650 in words is "six hundred sixty million, one hundred sixty-one thousand, six hundred fifty".