67666190672 has 10 divisors (see below), whose sum is σ = 131103244458. Its totient is φ = 33833095328.

The previous prime is 67666190659. The next prime is 67666190701. The reversal of 67666190672 is 27609166676.

It can be written as a sum of positive squares in only one way, i.e., 65851771456 + 1814419216 = 256616^2 + 42596^2 .

It is a super-3 number, since 3×67666190672³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114568443 + ... + 2114568474.

Almost surely, 2^67666190672 is an apocalyptic number.

It is an amenable number.

67666190672 is a deficient number, since it is larger than the sum of its proper divisors (63437053786).

67666190672 is a wasteful number, since it uses less digits than its factorization.

67666190672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4229136925 (or 4229136919 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 67666190672 in words is "sixty-seven billion, six hundred sixty-six million, one hundred ninety thousand, six hundred seventy-two".