66929647942 has 8 divisors (see below), whose sum is σ = 100397290176. Its totient is φ = 33463884552.

The previous prime is 66929647913. The next prime is 66929647943. The reversal of 66929647942 is 24974692966.

It is a happy number.

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 (66929647943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376993 + ... + 525340.

It is an arithmetic number, because the mean of its divisors is an integer number (12549661272).

Almost surely, 2^66929647942 is an apocalyptic number.

66929647942 is a deficient number, since it is larger than the sum of its proper divisors (33467642234).

66929647942 is a wasteful number, since it uses less digits than its factorization.

66929647942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939422.

The product of its digits is 70543872, while the sum is 64.

The spelling of 66929647942 in words is "sixty-six billion, nine hundred twenty-nine million, six hundred forty-seven thousand, nine hundred forty-two".