666034721623067 has 16 divisors (see below), whose sum is σ = 742713751251360. Its totient is φ = 593556552110592.

The previous prime is 666034721623057. The next prime is 666034721623099. The reversal of 666034721623067 is 760326127430666.

It is a cyclic number.

It is not a de Polignac number, because 666034721623067 - 2¹⁶ = 666034721557531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666034721622997 and 666034721623015.

It is not an unprimeable number, because it can be changed into a prime (666034721623057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532750448 + ... + 533999165.

It is an arithmetic number, because the mean of its divisors is an integer number (46419609453210).

Almost surely, 2^{666034721623067} is an apocalyptic number.

666034721623067 is a deficient number, since it is larger than the sum of its proper divisors (76679029628293).

666034721623067 is a wasteful number, since it uses less digits than its factorization.

666034721623067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066751582.

The product of its (nonzero) digits is 54867456, while the sum is 59.

The spelling of 666034721623067 in words is "six hundred sixty-six trillion, thirty-four billion, seven hundred twenty-one million, six hundred twenty-three thousand, sixty-seven".