51005665670 has 32 divisors (see below), whose sum is σ = 92336702976. Its totient is φ = 20285372800.

The previous prime is 51005665631. The next prime is 51005665679. The reversal of 51005665670 is 7656650015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005665679) 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, 4725680 + ... + 4736460.

It is an arithmetic number, because the mean of its divisors is an integer number (2885521968).

Almost surely, 2^51005665670 is an apocalyptic number.

51005665670 is a deficient number, since it is larger than the sum of its proper divisors (41331037306).

51005665670 is a wasteful number, since it uses less digits than its factorization.

51005665670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13456.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 51005665670 in words is "fifty-one billion, five million, six hundred sixty-five thousand, six hundred seventy".