1601011660 has 48 divisors (see below), whose sum is σ = 3427909632. Its totient is φ = 627972800.

The previous prime is 1601011637. The next prime is 1601011661. The reversal of 1601011660 is 661101061.

It is not an unprimeable number, because it can be changed into a prime (1601011661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268269 + ... + 274171.

It is an arithmetic number, because the mean of its divisors is an integer number (71414784).

Almost surely, 2^1601011660 is an apocalyptic number.

1601011660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601011660 is an abundant number, since it is smaller than the sum of its proper divisors (1826897972).

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

1601011660 is a wasteful number, since it uses less digits than its factorization.

1601011660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174 (or 6172 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1601011660 is about 40012.6437516943. The cubic root of 1601011660 is about 1169.8535526639.

The spelling of 1601011660 in words is "one billion, six hundred one million, eleven thousand, six hundred sixty".