51464620066 has 8 divisors (see below), whose sum is σ = 81259926480. Its totient is φ = 24377977908.

The previous prime is 51464620033. The next prime is 51464620079. The reversal of 51464620066 is 66002646415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×51464620066⁴ (a number of 44 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677166016 + ... + 677166091.

It is an arithmetic number, because the mean of its divisors is an integer number (10157490810).

Almost surely, 2^51464620066 is an apocalyptic number.

51464620066 is a deficient number, since it is larger than the sum of its proper divisors (29795306414).

51464620066 is a wasteful number, since it uses less digits than its factorization.

51464620066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354332128.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 51464620066 in words is "fifty-one billion, four hundred sixty-four million, six hundred twenty thousand, sixty-six".