611666007612 has 144 divisors (see below), whose sum is σ = 1664720951040. Its totient is φ = 174288942080.

The previous prime is 611666007581. The next prime is 611666007637. The reversal of 611666007612 is 216700666116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1815148 + ... + 2125580.

It is an arithmetic number, because the mean of its divisors is an integer number (11560562160).

Almost surely, 2^611666007612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611666007612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832360475520).

611666007612 is an abundant number, since it is smaller than the sum of its proper divisors (1053054943428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611666007612 is a wasteful number, since it uses less digits than its factorization.

611666007612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310544 (or 310531 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 611666007612 in words is "six hundred eleven billion, six hundred sixty-six million, seven thousand, six hundred twelve".