66739068 has 36 divisors (see below), whose sum is σ = 184039128. Its totient is φ = 20223840.

The previous prime is 66739067. The next prime is 66739081. The reversal of 66739068 is 86093766.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66739061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83871 + ... + 84662.

It is an arithmetic number, because the mean of its divisors is an integer number (5112198).

Almost surely, 2^66739068 is an apocalyptic number.

It is an amenable number.

66739068 is an abundant number, since it is smaller than the sum of its proper divisors (117300060).

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

66739068 is a wasteful number, since it uses less digits than its factorization.

66739068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168554 (or 168549 counting only the distinct ones).

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

The square root of 66739068 is about 8169.3982642542. The cubic root of 66739068 is about 405.6268664439.

The spelling of 66739068 in words is "sixty-six million, seven hundred thirty-nine thousand, sixty-eight".