666611416 has 32 divisors (see below), whose sum is σ = 1277574480. Its totient is φ = 325987200.

The previous prime is 666611411. The next prime is 666611423. The reversal of 666611416 is 614116666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666611411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84555 + ... + 92101.

Almost surely, 2^666611416 is an apocalyptic number.

It is an amenable number.

666611416 is a deficient number, since it is larger than the sum of its proper divisors (610963064).

666611416 is a wasteful number, since it uses less digits than its factorization.

666611416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795 (or 7791 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 666611416 is about 25818.8190279881. The cubic root of 666611416 is about 873.5563311181.

The spelling of 666611416 in words is "six hundred sixty-six million, six hundred eleven thousand, four hundred sixteen".