661342001057 has 8 divisors (see below), whose sum is σ = 661672381920. Its totient is φ = 661011710400.

The previous prime is 661342001051. The next prime is 661342001063. The reversal of 661342001057 is 750100243166.

It is an interprime number because it is at equal distance from previous prime (661342001051) and next prime (661342001063).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661342001057 - 2⁸ = 661342000801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661342001051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18069458 + ... + 18106020.

It is an arithmetic number, because the mean of its divisors is an integer number (82709047740).

Almost surely, 2^661342001057 is an apocalyptic number.

It is an amenable number.

661342001057 is a deficient number, since it is larger than the sum of its proper divisors (330380863).

661342001057 is a wasteful number, since it uses less digits than its factorization.

661342001057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45103.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 661342001057 in words is "six hundred sixty-one billion, three hundred forty-two million, one thousand, fifty-seven".