66744042 has 16 divisors (see below), whose sum is σ = 136328832. Its totient is φ = 21774560.

The previous prime is 66744031. The next prime is 66744049. The reversal of 66744042 is 24044766.

It is a junction number, because it is equal to n+sod(n) for n = 66743994 and 66744012.

It is not an unprimeable number, because it can be changed into a prime (66744049) 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, 118059 + ... + 118622.

It is an arithmetic number, because the mean of its divisors is an integer number (8520552).

Almost surely, 2^66744042 is an apocalyptic number.

66744042 is an abundant number, since it is smaller than the sum of its proper divisors (69584790).

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

66744042 is a wasteful number, since it uses less digits than its factorization.

66744042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236733.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 66744042 is about 8169.7026873687. The cubic root of 66744042 is about 405.6369431899.

The spelling of 66744042 in words is "sixty-six million, seven hundred forty-four thousand, forty-two".