66904427379 has 8 divisors (see below), whose sum is σ = 91616873680. Its totient is φ = 43397466336.

The previous prime is 66904427377. The next prime is 66904427383. The reversal of 66904427379 is 97372440966.

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

It is not a de Polignac number, because 66904427379 - 2¹ = 66904427377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66904427377) 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, 301371184 + ... + 301371405.

It is an arithmetic number, because the mean of its divisors is an integer number (11452109210).

Almost surely, 2^66904427379 is an apocalyptic number.

66904427379 is a deficient number, since it is larger than the sum of its proper divisors (24712446301).

66904427379 is a wasteful number, since it uses less digits than its factorization.

66904427379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602742629.

The product of its (nonzero) digits is 13716864, while the sum is 57.

The spelling of 66904427379 in words is "sixty-six billion, nine hundred four million, four hundred twenty-seven thousand, three hundred seventy-nine".