665020263457 has 8 divisors (see below), whose sum is σ = 725498085600. Its totient is φ = 604546013760.

The previous prime is 665020263407. The next prime is 665020263461. The reversal of 665020263457 is 754362020566.

665020263457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665020263457 - 2¹⁵ = 665020230689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665020263407) 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, 496207 + ... + 1255492.

It is an arithmetic number, because the mean of its divisors is an integer number (90687260700).

Almost surely, 2^665020263457 is an apocalyptic number.

It is an amenable number.

665020263457 is a deficient number, since it is larger than the sum of its proper divisors (60477822143).

665020263457 is a wasteful number, since it uses less digits than its factorization.

665020263457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786223.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 665020263457 in words is "six hundred sixty-five billion, twenty million, two hundred sixty-three thousand, four hundred fifty-seven".