1661550060 has 24 divisors (see below), whose sum is σ = 4652340336. Its totient is φ = 443080000.

The previous prime is 1661550013. The next prime is 1661550071. The reversal of 1661550060 is 600551661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13846191 + ... + 13846310.

It is an arithmetic number, because the mean of its divisors is an integer number (193847514).

Almost surely, 2^1661550060 is an apocalyptic number.

1661550060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661550060 is an abundant number, since it is smaller than the sum of its proper divisors (2990790276).

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

1661550060 is a wasteful number, since it uses less digits than its factorization.

1661550060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27692513 (or 27692511 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1661550060 is about 40762.1154995665. The cubic root of 1661550060 is about 1184.4165761982.

The spelling of 1661550060 in words is "one billion, six hundred sixty-one million, five hundred fifty thousand, sixty".