145891660 has 24 divisors (see below), whose sum is σ = 311567760. Its totient is φ = 57367104.

The previous prime is 145891651. The next prime is 145891667. The reversal of 145891660 is 66198541.

It is not an unprimeable number, because it can be changed into a prime (145891667) 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, 60639 + ... + 62998.

It is an arithmetic number, because the mean of its divisors is an integer number (12981990).

Almost surely, 2^145891660 is an apocalyptic number.

145891660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145891660 is an abundant number, since it is smaller than the sum of its proper divisors (165676100).

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

145891660 is a wasteful number, since it uses less digits than its factorization.

145891660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123705 (or 123703 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 145891660 is about 12078.5620005032. The cubic root of 145891660 is about 526.4334642039.

The spelling of 145891660 in words is "one hundred forty-five million, eight hundred ninety-one thousand, six hundred sixty".