669892501 has 4 divisors (see below), whose sum is σ = 670121100. Its totient is φ = 669663904.

The previous prime is 669892477. The next prime is 669892513. The reversal of 669892501 is 105298966.

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 358193476 + 311699025 = 18926^2 + 17655^2 .

It is a cyclic number.

It is not a de Polignac number, because 669892501 - 2¹¹ = 669890453 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 (669892541) 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, 109846 + ... + 115783.

It is an arithmetic number, because the mean of its divisors is an integer number (167530275).

Almost surely, 2^669892501 is an apocalyptic number.

It is an amenable number.

669892501 is a deficient number, since it is larger than the sum of its proper divisors (228599).

669892501 is a wasteful number, since it uses less digits than its factorization.

669892501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228598.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 669892501 is about 25882.2816034445. The cubic root of 669892501 is about 874.9872111328.

It can be divided in two parts, 6698 and 92501, that added together give a palindrome (99199).

The spelling of 669892501 in words is "six hundred sixty-nine million, eight hundred ninety-two thousand, five hundred one".