654929872666 has 16 divisors (see below), whose sum is σ = 1014769836288. Its totient is φ = 316687528800.

The previous prime is 654929872661. The next prime is 654929872673. The reversal of 654929872666 is 666278929456.

It is a super-2 number, since 2×654929872666² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 654929872595 and 654929872604.

It is not an unprimeable number, because it can be changed into a prime (654929872661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3474480 + ... + 3658123.

It is an arithmetic number, because the mean of its divisors is an integer number (63423114768).

Almost surely, 2^654929872666 is an apocalyptic number.

654929872666 is a deficient number, since it is larger than the sum of its proper divisors (359839963622).

654929872666 is a wasteful number, since it uses less digits than its factorization.

654929872666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134117.

The product of its digits is 470292480, while the sum is 70.

The spelling of 654929872666 in words is "six hundred fifty-four billion, nine hundred twenty-nine million, eight hundred seventy-two thousand, six hundred sixty-six".