5651505666556 has 6 divisors (see below), whose sum is σ = 9890134916480. Its totient is φ = 2825752833276.

The previous prime is 5651505666509. The next prime is 5651505666557. The reversal of 5651505666556 is 6556665051565.

It is a happy number.

It is a super-2 number, since 2×5651505666556² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5651505666494 and 5651505666503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651505666557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 706438208316 + ... + 706438208323.

Almost surely, 2^{5651505666556} is an apocalyptic number.

It is an amenable number.

5651505666556 is a deficient number, since it is larger than the sum of its proper divisors (4238629249924).

5651505666556 is a wasteful number, since it uses less digits than its factorization.

5651505666556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412876416643 (or 1412876416641 counting only the distinct ones).

The product of its (nonzero) digits is 121500000, while the sum is 61.

The spelling of 5651505666556 in words is "five trillion, six hundred fifty-one billion, five hundred five million, six hundred sixty-six thousand, five hundred fifty-six".