666770038354 has 32 divisors (see below), whose sum is σ = 1222021921536. Its totient is φ = 266338091520.

The previous prime is 666770038349. The next prime is 666770038357. The reversal of 666770038354 is 453830077666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 666770038295 and 666770038304.

It is not an unprimeable number, because it can be changed into a prime (666770038357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13575267 + ... + 13624294.

It is an arithmetic number, because the mean of its divisors is an integer number (38188185048).

Almost surely, 2^666770038354 is an apocalyptic number.

666770038354 is a deficient number, since it is larger than the sum of its proper divisors (555251883182).

666770038354 is a wasteful number, since it uses less digits than its factorization.

666770038354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27199690.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 666770038354 in words is "six hundred sixty-six billion, seven hundred seventy million, thirty-eight thousand, three hundred fifty-four".