674663745640 has 32 divisors (see below), whose sum is σ = 1519463020680. Its totient is φ = 269604237312.

The previous prime is 674663745593. The next prime is 674663745641. The reversal of 674663745640 is 46547366476.

It can be written as a sum of positive squares in 4 ways, for example, as 674609251716 + 54493924 = 821346^2 + 7382^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (674663745641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8122569 + ... + 8205208.

Almost surely, 2^674663745640 is an apocalyptic number.

It is an amenable number.

674663745640 is an abundant number, since it is smaller than the sum of its proper divisors (844799275040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

674663745640 is a wasteful number, since it uses less digits than its factorization.

674663745640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16328821 (or 16328817 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 58.

The spelling of 674663745640 in words is "six hundred seventy-four billion, six hundred sixty-three million, seven hundred forty-five thousand, six hundred forty".