66929742 has 48 divisors (see below), whose sum is σ = 166533120. Its totient is φ = 19213200.

The previous prime is 66929591. The next prime is 66929743. The reversal of 66929742 is 24792966.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66929743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5134 + ... + 12657.

It is an arithmetic number, because the mean of its divisors is an integer number (3469440).

Almost surely, 2^66929742 is an apocalyptic number.

66929742 is an abundant number, since it is smaller than the sum of its proper divisors (99603378).

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

66929742 is a wasteful number, since it uses less digits than its factorization.

66929742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17829 (or 17826 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 66929742 is about 8181.0599557759. The cubic root of 66929742 is about 406.0127921099.

The spelling of 66929742 in words is "sixty-six million, nine hundred twenty-nine thousand, seven hundred forty-two".