661655062126 has 4 divisors (see below), whose sum is σ = 992482593192. Its totient is φ = 330827531062.

The previous prime is 661655062091. The next prime is 661655062151. The reversal of 661655062126 is 621260556166.

661655062126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165413765530 + ... + 165413765533.

It is an arithmetic number, because the mean of its divisors is an integer number (248120648298).

Almost surely, 2^661655062126 is an apocalyptic number.

661655062126 is a deficient number, since it is larger than the sum of its proper divisors (330827531066).

661655062126 is a wasteful number, since it uses less digits than its factorization.

661655062126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330827531065.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 661655062126 in words is "six hundred sixty-one billion, six hundred fifty-five million, sixty-two thousand, one hundred twenty-six".