1661000060 has 24 divisors (see below), whose sum is σ = 3489667440. Its totient is φ = 664101504.

The previous prime is 1661000059. The next prime is 1661000063. The reversal of 1661000060 is 600001661.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1660999996 and 1661000041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661000063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30071 + ... + 65009.

It is an arithmetic number, because the mean of its divisors is an integer number (145402810).

Almost surely, 2^1661000060 is an apocalyptic number.

1661000060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661000060 is an abundant number, since it is smaller than the sum of its proper divisors (1828667380).

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

1661000060 is a wasteful number, since it uses less digits than its factorization.

1661000060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37325 (or 37323 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1661000060 is about 40755.3684807290. The cubic root of 1661000060 is about 1184.2858747479.

The spelling of 1661000060 in words is "one billion, six hundred sixty-one million, sixty", and thus it is an aban number.