51466660290 has 24 divisors (see below), whose sum is σ = 133813316988. Its totient is φ = 13724442720.

The previous prime is 51466660283. The next prime is 51466660307. The reversal of 51466660290 is 9206666415.

It can be written as a sum of positive squares in 2 ways, for example, as 42036890841 + 9429769449 = 205029^2 + 97107^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285925801 + ... + 285925980.

Almost surely, 2^51466660290 is an apocalyptic number.

51466660290 is an abundant number, since it is smaller than the sum of its proper divisors (82346656698).

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

51466660290 is a wasteful number, since it uses less digits than its factorization.

51466660290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571851794 (or 571851791 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 51466660290 in words is "fifty-one billion, four hundred sixty-six million, six hundred sixty thousand, two hundred ninety".