1661254170 has 32 divisors (see below), whose sum is σ = 4196854080. Its totient is φ = 419685120.

The previous prime is 1661254169. The next prime is 1661254187. The reversal of 1661254170 is 714521661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456671 + ... + 1457810.

It is an arithmetic number, because the mean of its divisors is an integer number (131151690).

Almost surely, 2^1661254170 is an apocalyptic number.

1661254170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661254170 is an abundant number, since it is smaller than the sum of its proper divisors (2535599910).

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

1661254170 is a wasteful number, since it uses less digits than its factorization.

1661254170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914510.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1661254170 is about 40758.4858649092. The cubic root of 1661254170 is about 1184.3462647795.

The spelling of 1661254170 in words is "one billion, six hundred sixty-one million, two hundred fifty-four thousand, one hundred seventy".