66696910 has 16 divisors (see below), whose sum is σ = 137205216. Its totient is φ = 22867488.

The previous prime is 66696907. The next prime is 66696919. The reversal of 66696910 is 1969666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66696919) 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, 476337 + ... + 476476.

It is an arithmetic number, because the mean of its divisors is an integer number (8575326).

Almost surely, 2^66696910 is an apocalyptic number.

66696910 is an abundant number, since it is smaller than the sum of its proper divisors (70508306).

66696910 is a wasteful number, since it uses less digits than its factorization.

66696910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952827.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 66696910 is about 8166.8176176525. The cubic root of 66696910 is about 405.5414391228.

The spelling of 66696910 in words is "sixty-six million, six hundred ninety-six thousand, nine hundred ten".