6669621476460 has 72 divisors (see below), whose sum is σ = 20231396124576. Its totient is φ = 1778547179520.

The previous prime is 6669621476447. The next prime is 6669621476461. The reversal of 6669621476460 is 646741269666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6669621476461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31690497 + ... + 31900263.

Almost surely, 2^{6669621476460} is an apocalyptic number.

6669621476460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6669621476460 is an abundant number, since it is smaller than the sum of its proper divisors (13561774648116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6669621476460 is a wasteful number, since it uses less digits than its factorization.

6669621476460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386423 (or 386418 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 63.

The spelling of 6669621476460 in words is "six trillion, six hundred sixty-nine billion, six hundred twenty-one million, four hundred seventy-six thousand, four hundred sixty".