66165042 has 16 divisors (see below), whose sum is σ = 134194752. Its totient is φ = 21744240.

The previous prime is 66165031. The next prime is 66165059. The reversal of 66165042 is 24056166.

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, 77233 + ... + 78084.

It is an arithmetic number, because the mean of its divisors is an integer number (8387172).

Almost surely, 2^66165042 is an apocalyptic number.

66165042 is an abundant number, since it is smaller than the sum of its proper divisors (68029710).

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

66165042 is a wasteful number, since it uses less digits than its factorization.

66165042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155393.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66165042 is about 8134.1896953538. The cubic root of 66165042 is about 404.4605773921.

It can be divided in two parts, 661 and 65042, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 66165042 in words is "sixty-six million, one hundred sixty-five thousand, forty-two".