661011065006 has 16 divisors (see below), whose sum is σ = 1034832436128. Its totient is φ = 316072653600.

The previous prime is 661011064979. The next prime is 661011065017. The reversal of 661011065006 is 600560110166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200005 + ... + 1661936.

It is an arithmetic number, because the mean of its divisors is an integer number (64677027258).

Almost surely, 2^661011065006 is an apocalyptic number.

661011065006 is a deficient number, since it is larger than the sum of its proper divisors (373821371122).

661011065006 is a wasteful number, since it uses less digits than its factorization.

661011065006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866987.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 661011065006 in words is "six hundred sixty-one billion, eleven million, sixty-five thousand, six".