651436550066 has 32 divisors (see below), whose sum is σ = 1047862099200. Its totient is φ = 302815169280.

The previous prime is 651436550053. The next prime is 651436550087. The reversal of 651436550066 is 660055634156.

It is a self number, because there is not a number n which added to its sum of digits gives 651436550066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679175 + ... + 1328213.

It is an arithmetic number, because the mean of its divisors is an integer number (32745690600).

Almost surely, 2^651436550066 is an apocalyptic number.

651436550066 is a deficient number, since it is larger than the sum of its proper divisors (396425549134).

651436550066 is a wasteful number, since it uses less digits than its factorization.

651436550066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649554.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 651436550066 in words is "six hundred fifty-one billion, four hundred thirty-six million, five hundred fifty thousand, sixty-six".