6651966481 has 8 divisors (see below), whose sum is σ = 7002918720. Its totient is φ = 6301099152.

The previous prime is 6651966473. The next prime is 6651966521. The reversal of 6651966481 is 1846691566.

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

It is a cyclic number.

It is not a de Polignac number, because 6651966481 - 2³ = 6651966473 is a prime.

It is a super-2 number, since 2×6651966481² = 88497316128695046722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651966421) 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, 197436 + ... + 228658.

It is an arithmetic number, because the mean of its divisors is an integer number (875364840).

Almost surely, 2^6651966481 is an apocalyptic number.

It is an amenable number.

6651966481 is a deficient number, since it is larger than the sum of its proper divisors (350952239).

6651966481 is a wasteful number, since it uses less digits than its factorization.

6651966481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42455.

The product of its digits is 1866240, while the sum is 52.

The square root of 6651966481 is about 81559.5885288787. The cubic root of 6651966481 is about 1880.6876993122.

The spelling of 6651966481 in words is "six billion, six hundred fifty-one million, nine hundred sixty-six thousand, four hundred eighty-one".