661454606454107 has 8 divisors (see below), whose sum is σ = 675574732929600. Its totient is φ = 647336422654144.

The previous prime is 661454606454079. The next prime is 661454606454113. The reversal of 661454606454107 is 701454606454166.

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 661454606454107 - 2¹⁶ = 661454606388571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661454606454127) 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, 484980632 + ... + 486342597.

It is an arithmetic number, because the mean of its divisors is an integer number (84446841616200).

Almost surely, 2^{661454606454107} is an apocalyptic number.

661454606454107 is a deficient number, since it is larger than the sum of its proper divisors (14120126475493).

661454606454107 is a wasteful number, since it uses less digits than its factorization.

661454606454107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971337765.

The product of its (nonzero) digits is 58060800, while the sum is 59.

Adding to 661454606454107 its sum of digits (59), we get a palindrome (661454606454166).

The spelling of 661454606454107 in words is "six hundred sixty-one trillion, four hundred fifty-four billion, six hundred six million, four hundred fifty-four thousand, one hundred seven".