665501406016450 has 24 divisors (see below), whose sum is σ = 1237835960535168. Its totient is φ = 266199842977680.

The previous prime is 665501406016393. The next prime is 665501406016453. The reversal of 665501406016450 is 54610604105566.

It is a super-3 number, since 3×665501406016450³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665501406016394 and 665501406016403.

It is not an unprimeable number, because it can be changed into a prime (665501406016453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 896379 + ... + 36493921.

It is an arithmetic number, because the mean of its divisors is an integer number (51576498355632).

Almost surely, 2^{665501406016450} is an apocalyptic number.

665501406016450 is a deficient number, since it is larger than the sum of its proper divisors (572334554518718).

665501406016450 is a wasteful number, since it uses less digits than its factorization.

665501406016450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35971458 (or 35971453 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 665501406016450 in words is "six hundred sixty-five trillion, five hundred one billion, four hundred six million, sixteen thousand, four hundred fifty".