611666126001 has 64 divisors (see below), whose sum is σ = 1114520808960. Its totient is φ = 323570350080.

The previous prime is 611666125997. The next prime is 611666126011. The reversal of 611666126001 is 100621666116.

It is a happy number.

It is not a de Polignac number, because 611666126001 - 2² = 611666125997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611666126011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1364436 + ... + 1756421.

It is an arithmetic number, because the mean of its divisors is an integer number (17414387640).

Almost surely, 2^611666126001 is an apocalyptic number.

611666126001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

611666126001 is a deficient number, since it is larger than the sum of its proper divisors (502854682959).

611666126001 is a wasteful number, since it uses less digits than its factorization.

611666126001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120951 (or 3120945 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 611666126001 in words is "six hundred eleven billion, six hundred sixty-six million, one hundred twenty-six thousand, one".