661425456034 has 64 divisors (see below), whose sum is σ = 1188315152640. Its totient is φ = 270119808000.

The previous prime is 661425455987. The next prime is 661425456103. The reversal of 661425456034 is 430654524166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34800534 + ... + 34819534.

It is an arithmetic number, because the mean of its divisors is an integer number (18567424260).

Almost surely, 2^661425456034 is an apocalyptic number.

661425456034 is a deficient number, since it is larger than the sum of its proper divisors (526889696606).

661425456034 is a wasteful number, since it uses less digits than its factorization.

661425456034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20155.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 661425456034 in words is "six hundred sixty-one billion, four hundred twenty-five million, four hundred fifty-six thousand, thirty-four".