665432747494 has 16 divisors (see below), whose sum is σ = 1014016050432. Its totient is φ = 327457881928.

The previous prime is 665432747431. The next prime is 665432747513. The reversal of 665432747494 is 494747234566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7577314 + ... + 7664629.

It is an arithmetic number, because the mean of its divisors is an integer number (63376003152).

Almost surely, 2^665432747494 is an apocalyptic number.

665432747494 is a deficient number, since it is larger than the sum of its proper divisors (348583302938).

665432747494 is a wasteful number, since it uses less digits than its factorization.

665432747494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15242291.

The product of its digits is 121927680, while the sum is 61.

The spelling of 665432747494 in words is "six hundred sixty-five billion, four hundred thirty-two million, seven hundred forty-seven thousand, four hundred ninety-four".