662451652561 has 4 divisors (see below), whose sum is σ = 662884346224. Its totient is φ = 662018958900.

The previous prime is 662451652547. The next prime is 662451652571. The reversal of 662451652561 is 165256154266.

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.

It is a cyclic number.

It is not a de Polignac number, because 662451652561 - 2¹⁵ = 662451619793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662451652501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216344535 + ... + 216347596.

It is an arithmetic number, because the mean of its divisors is an integer number (165721086556).

Almost surely, 2^662451652561 is an apocalyptic number.

It is an amenable number.

662451652561 is a deficient number, since it is larger than the sum of its proper divisors (432693663).

662451652561 is a wasteful number, since it uses less digits than its factorization.

662451652561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432693662.

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

The spelling of 662451652561 in words is "six hundred sixty-two billion, four hundred fifty-one million, six hundred fifty-two thousand, five hundred sixty-one".