145648660 has 24 divisors (see below), whose sum is σ = 306290376. Its totient is φ = 58177920.

The previous prime is 145648621. The next prime is 145648669. The reversal of 145648660 is 66846541.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 156816 + 145491844 = 396^2 + 12062^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145648669) 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, 10750 + ... + 20170.

It is an arithmetic number, because the mean of its divisors is an integer number (12762099).

Almost surely, 2^145648660 is an apocalyptic number.

145648660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145648660 is an abundant number, since it is smaller than the sum of its proper divisors (160641716).

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

145648660 is a wasteful number, since it uses less digits than its factorization.

145648660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203 (or 10201 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 145648660 is about 12068.4986638770. The cubic root of 145648660 is about 526.1410224896.

The spelling of 145648660 in words is "one hundred forty-five million, six hundred forty-eight thousand, six hundred sixty".