145666642 has 16 divisors (see below), whose sum is σ = 252385632. Its totient is φ = 62317120.

The previous prime is 145666639. The next prime is 145666663. The reversal of 145666642 is 246666541.

It is a junction number, because it is equal to n+sod(n) for n = 145666595 and 145666604.

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 7 ways as a sum of consecutive naturals, for example, 194368 + ... + 195115.

It is an arithmetic number, because the mean of its divisors is an integer number (15774102).

Almost surely, 2^145666642 is an apocalyptic number.

145666642 is a deficient number, since it is larger than the sum of its proper divisors (106718990).

145666642 is a wasteful number, since it uses less digits than its factorization.

145666642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389513.

The product of its digits is 207360, while the sum is 40.

The square root of 145666642 is about 12069.2436382733. The cubic root of 145666642 is about 526.1626743160.

The spelling of 145666642 in words is "one hundred forty-five million, six hundred sixty-six thousand, six hundred forty-two".