674391661778704 has 45 divisors (see below), whose sum is σ = 1309567328918229. Its totient is φ = 336440495042880.

The previous prime is 674391661778693. The next prime is 674391661778741. The reversal of 674391661778704 is 407877166193476.

The square root of 674391661778704 is 25969052.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 216167975833104 + 458223685945600 = 14702652^2 + 21406160^2 .

It is a super-2 number, since 2×674391661778704² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47886924847 + ... + 47886938929.

Almost surely, 2^{674391661778704} is an apocalyptic number.

674391661778704 is the 25969052-nd square number.

It is an amenable number.

674391661778704 is a deficient number, since it is larger than the sum of its proper divisors (635175667139525).

674391661778704 is an frugal number, since it uses more digits than its factorization.

674391661778704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29096 (or 14546 counting only the distinct ones).

The product of its (nonzero) digits is 1792336896, while the sum is 76.

The spelling of 674391661778704 in words is "six hundred seventy-four trillion, three hundred ninety-one billion, six hundred sixty-one million, seven hundred seventy-eight thousand, seven hundred four".