51666733338 has 32 divisors (see below), whose sum is σ = 112771265472. Its totient is φ = 15650496000.

The previous prime is 51666733333. The next prime is 51666733373. The reversal of 51666733338 is 83333766615.

It is not an unprimeable number, because it can be changed into a prime (51666733333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20188 + ... + 322088.

It is an arithmetic number, because the mean of its divisors is an integer number (3524102046).

Almost surely, 2^51666733338 is an apocalyptic number.

51666733338 is an abundant number, since it is smaller than the sum of its proper divisors (61104532134).

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

51666733338 is a wasteful number, since it uses less digits than its factorization.

51666733338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304510.

The product of its digits is 4898880, while the sum is 51.

The spelling of 51666733338 in words is "fifty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, three hundred thirty-eight".