662473001591 has 4 divisors (see below), whose sum is σ = 663180017472. Its totient is φ = 661765985712.

The previous prime is 662473001579. The next prime is 662473001621. The reversal of 662473001591 is 195100374266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 662473001591 - 2¹⁸ = 662472739447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662473001521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353506535 + ... + 353508408.

It is an arithmetic number, because the mean of its divisors is an integer number (165795004368).

Almost surely, 2^662473001591 is an apocalyptic number.

662473001591 is a deficient number, since it is larger than the sum of its proper divisors (707015881).

662473001591 is an equidigital number, since it uses as much as digits as its factorization.

662473001591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707015880.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 662473001591 in words is "six hundred sixty-two billion, four hundred seventy-three million, one thousand, five hundred ninety-one".