51466604166 has 48 divisors (see below), whose sum is σ = 116498753280. Its totient is φ = 16389972720.

The previous prime is 51466604131. The next prime is 51466604173. The reversal of 51466604166 is 66140666415.

It is a happy number.

It is a super-2 number, since 2×51466604166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273261 + ... + 421431.

It is an arithmetic number, because the mean of its divisors is an integer number (2427057360).

Almost surely, 2^51466604166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51466604166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58249376640).

51466604166 is an abundant number, since it is smaller than the sum of its proper divisors (65032149114).

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

51466604166 is a wasteful number, since it uses less digits than its factorization.

51466604166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149041 (or 149038 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 51466604166 in words is "fifty-one billion, four hundred sixty-six million, six hundred four thousand, one hundred sixty-six".