662506402501 has 4 divisors (see below), whose sum is σ = 701477367372. Its totient is φ = 623535437632.

The previous prime is 662506402499. The next prime is 662506402529. The reversal of 662506402501 is 105204605266.

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

It can be written as a sum of positive squares in 2 ways, for example, as 531150897601 + 131355504900 = 728801^2 + 362430^2 .

It is a cyclic number.

It is not a de Polignac number, because 662506402501 - 2¹ = 662506402499 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 (662506402801) 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, 19485482410 + ... + 19485482443.

It is an arithmetic number, because the mean of its divisors is an integer number (175369341843).

Almost surely, 2^662506402501 is an apocalyptic number.

It is an amenable number.

662506402501 is a deficient number, since it is larger than the sum of its proper divisors (38970964871).

662506402501 is a wasteful number, since it uses less digits than its factorization.

662506402501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38970964870.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 662506402501 in words is "six hundred sixty-two billion, five hundred six million, four hundred two thousand, five hundred one".