51102220666 has 32 divisors (see below), whose sum is σ = 89767948032. Its totient is φ = 21360243840.

The previous prime is 51102220651. The next prime is 51102220667. The reversal of 51102220666 is 66602220115.

It is a super-2 number, since 2×51102220666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51102220667) 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, 2167755 + ... + 2191201.

It is an arithmetic number, because the mean of its divisors is an integer number (2805248376).

Almost surely, 2^51102220666 is an apocalyptic number.

51102220666 is a deficient number, since it is larger than the sum of its proper divisors (38665727366).

51102220666 is a wasteful number, since it uses less digits than its factorization.

51102220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27294.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 51102220666 in words is "fifty-one billion, one hundred two million, two hundred twenty thousand, six hundred sixty-six".