669437577453 has 8 divisors (see below), whose sum is σ = 921376450816. Its totient is φ = 431895211200.

The previous prime is 669437577449. The next prime is 669437577461. The reversal of 669437577453 is 354775734966.

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

It is not a de Polignac number, because 669437577453 - 2² = 669437577449 is a prime.

It is a super-2 number, since 2×669437577453² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669437577443) 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, 3599126668 + ... + 3599126853.

It is an arithmetic number, because the mean of its divisors is an integer number (115172056352).

Almost surely, 2^669437577453 is an apocalyptic number.

It is an amenable number.

669437577453 is a deficient number, since it is larger than the sum of its proper divisors (251938873363).

669437577453 is a wasteful number, since it uses less digits than its factorization.

669437577453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198253555.

The product of its digits is 400075200, while the sum is 66.

The spelling of 669437577453 in words is "six hundred sixty-nine billion, four hundred thirty-seven million, five hundred seventy-seven thousand, four hundred fifty-three".