669624879554 has 8 divisors (see below), whose sum is σ = 1048108507200. Its totient is φ = 320255377156.

The previous prime is 669624879551. The next prime is 669624879593. The reversal of 669624879554 is 455978426966.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (669624879551) 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, 7278531254 + ... + 7278531345.

It is an arithmetic number, because the mean of its divisors is an integer number (131013563400).

Almost surely, 2^669624879554 is an apocalyptic number.

669624879554 is a deficient number, since it is larger than the sum of its proper divisors (378483627646).

669624879554 is a wasteful number, since it uses less digits than its factorization.

669624879554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557062624.

The product of its digits is 783820800, while the sum is 71.

The spelling of 669624879554 in words is "six hundred sixty-nine billion, six hundred twenty-four million, eight hundred seventy-nine thousand, five hundred fifty-four".