666701974 has 8 divisors (see below), whose sum is σ = 1003771440. Its totient is φ = 332111496.

The previous prime is 666701941. The next prime is 666701977. The reversal of 666701974 is 479107666.

666701974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (666701977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619074 + ... + 620149.

It is an arithmetic number, because the mean of its divisors is an integer number (125471430).

Almost surely, 2^666701974 is an apocalyptic number.

666701974 is a deficient number, since it is larger than the sum of its proper divisors (337069466).

666701974 is a wasteful number, since it uses less digits than its factorization.

666701974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239494.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 666701974 is about 25820.5726892337. The cubic root of 666701974 is about 873.5958863624.

It can be divided in two parts, 66670 and 1974, that added together give a square (68644 = 262²).

The spelling of 666701974 in words is "six hundred sixty-six million, seven hundred one thousand, nine hundred seventy-four".