674676721 has 4 divisors (see below), whose sum is σ = 674752000. Its totient is φ = 674601444.

The previous prime is 674676713. The next prime is 674676781. The reversal of 674676721 is 127676476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 674676721 - 2³ = 674676713 is a prime.

It is a super-3 number, since 3×674676721³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674676781) 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, 22041 + ... + 42838.

It is an arithmetic number, because the mean of its divisors is an integer number (168688000).

Almost surely, 2^674676721 is an apocalyptic number.

It is an amenable number.

674676721 is a deficient number, since it is larger than the sum of its proper divisors (75279).

674676721 is a wasteful number, since it uses less digits than its factorization.

674676721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75278.

The product of its digits is 592704, while the sum is 46.

The square root of 674676721 is about 25974.5398611794. The cubic root of 674676721 is about 877.0652585783.

The spelling of 674676721 in words is "six hundred seventy-four million, six hundred seventy-six thousand, seven hundred twenty-one".