66978922942 has 8 divisors (see below), whose sum is σ = 100542208032. Its totient is φ = 33464853600.

The previous prime is 66978922937. The next prime is 66978922973. The reversal of 66978922942 is 24922987966.

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

It is a super-2 number, since 2×66978922942² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 12300534 + ... + 12305977.

It is an arithmetic number, because the mean of its divisors is an integer number (12567776004).

Almost surely, 2^66978922942 is an apocalyptic number.

66978922942 is a deficient number, since it is larger than the sum of its proper divisors (33563285090).

66978922942 is a wasteful number, since it uses less digits than its factorization.

66978922942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24607874.

The product of its digits is 47029248, while the sum is 64.

The spelling of 66978922942 in words is "sixty-six billion, nine hundred seventy-eight million, nine hundred twenty-two thousand, nine hundred forty-two".