51666420462 has 16 divisors (see below), whose sum is σ = 103337945040. Its totient is φ = 17221289472.

The previous prime is 51666420457. The next prime is 51666420467. The reversal of 51666420462 is 26402466615.

It is an interprime number because it is at equal distance from previous prime (51666420457) and next prime (51666420467).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51666420467) 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 7 ways as a sum of consecutive naturals, for example, 74137 + ... + 329892.

It is an arithmetic number, because the mean of its divisors is an integer number (6458621565).

Almost surely, 2^51666420462 is an apocalyptic number.

51666420462 is an abundant number, since it is smaller than the sum of its proper divisors (51671524578).

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

51666420462 is a wasteful number, since it uses less digits than its factorization.

51666420462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425347.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 51666420462 in words is "fifty-one billion, six hundred sixty-six million, four hundred twenty thousand, four hundred sixty-two".