1660649064 has 16 divisors (see below), whose sum is σ = 4151622720. Its totient is φ = 553549680.

The previous prime is 1660649057. The next prime is 1660649093. The reversal of 1660649064 is 4609460661.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34596832 + ... + 34596879.

It is an arithmetic number, because the mean of its divisors is an integer number (259476420).

Almost surely, 2^1660649064 is an apocalyptic number.

It is an amenable number.

1660649064 is an abundant number, since it is smaller than the sum of its proper divisors (2490973656).

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

1660649064 is a wasteful number, since it uses less digits than its factorization.

1660649064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69193720 (or 69193716 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 1660649064 is about 40751.0621211276. The cubic root of 1660649064 is about 1184.2024493268.

The spelling of 1660649064 in words is "one billion, six hundred sixty million, six hundred forty-nine thousand, sixty-four".