66739834 has 16 divisors (see below), whose sum is σ = 115426368. Its totient is φ = 28348992.

The previous prime is 66739831. The next prime is 66739843. The reversal of 66739834 is 43893766.

It is not an unprimeable number, because it can be changed into a prime (66739831) 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, 19512 + ... + 22675.

It is an arithmetic number, because the mean of its divisors is an integer number (7214148).

Almost surely, 2^66739834 is an apocalyptic number.

66739834 is a deficient number, since it is larger than the sum of its proper divisors (48686534).

66739834 is a wasteful number, since it uses less digits than its factorization.

66739834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42309.

The product of its digits is 653184, while the sum is 46.

The square root of 66739834 is about 8169.4451463976. The cubic root of 66739834 is about 405.6284183035.

The spelling of 66739834 in words is "sixty-six million, seven hundred thirty-nine thousand, eight hundred thirty-four".