66929697830 has 8 divisors (see below), whose sum is σ = 120473456112. Its totient is φ = 26771879128.

The previous prime is 66929697829. The next prime is 66929697839. The reversal of 66929697830 is 3879692966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66929697839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3346484882 + ... + 3346484901.

It is an arithmetic number, because the mean of its divisors is an integer number (15059182014).

Almost surely, 2^66929697830 is an apocalyptic number.

66929697830 is a deficient number, since it is larger than the sum of its proper divisors (53543758282).

66929697830 is a wasteful number, since it uses less digits than its factorization.

66929697830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692969790.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 66929697830 in words is "sixty-six billion, nine hundred twenty-nine million, six hundred ninety-seven thousand, eight hundred thirty".