1661473060 has 24 divisors (see below), whose sum is σ = 3757485816. Its totient is φ = 613466880.

The previous prime is 1661473007. The next prime is 1661473061. The reversal of 1661473060 is 603741661.

It can be written as a sum of positive squares in 4 ways, for example, as 278823204 + 1382649856 = 16698^2 + 37184^2 .

It is not an unprimeable number, because it can be changed into a prime (1661473061) 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, 3194881 + ... + 3195400.

It is an arithmetic number, because the mean of its divisors is an integer number (156561909).

Almost surely, 2^1661473060 is an apocalyptic number.

1661473060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661473060 is an abundant number, since it is smaller than the sum of its proper divisors (2096012756).

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

1661473060 is a wasteful number, since it uses less digits than its factorization.

1661473060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390303 (or 6390301 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1661473060 is about 40761.1709841609. The cubic root of 1661473060 is about 1184.3982797317.

It can be divided in two parts, 1661 and 473060, that added together give a square (474721 = 689²).

The spelling of 1661473060 in words is "one billion, six hundred sixty-one million, four hundred seventy-three thousand, sixty".