661541053147 has 16 divisors (see below), whose sum is σ = 713185177600. Its totient is φ = 610005326112.

The previous prime is 661541053051. The next prime is 661541053169. The reversal of 661541053147 is 741350145166.

It is not a de Polignac number, because 661541053147 - 2¹¹ = 661541051099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661541063147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71909854 + ... + 71919052.

It is an arithmetic number, because the mean of its divisors is an integer number (44574073600).

Almost surely, 2^661541053147 is an apocalyptic number.

661541053147 is a deficient number, since it is larger than the sum of its proper divisors (51644124453).

661541053147 is a wasteful number, since it uses less digits than its factorization.

661541053147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 661541053147 in words is "six hundred sixty-one billion, five hundred forty-one million, fifty-three thousand, one hundred forty-seven".