611151605666 has 16 divisors (see below), whose sum is σ = 1093240139904. Its totient is φ = 250534198464.

The previous prime is 611151605611. The next prime is 611151605681. The reversal of 611151605666 is 666506151116.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948992855 + ... + 948993498.

It is an arithmetic number, because the mean of its divisors is an integer number (68327508744).

Almost surely, 2^611151605666 is an apocalyptic number.

611151605666 is a deficient number, since it is larger than the sum of its proper divisors (482088534238).

611151605666 is a wasteful number, since it uses less digits than its factorization.

611151605666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897986385.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 611151605666 in words is "six hundred eleven billion, one hundred fifty-one million, six hundred five thousand, six hundred sixty-six".