661616314635 has 8 divisors (see below), whose sum is σ = 1058586103440. Its totient is φ = 352862034464.

The previous prime is 661616314577. The next prime is 661616314637. The reversal of 661616314635 is 536413616166.

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 661616314635 - 2⁷ = 661616314507 is a prime.

It is a super-2 number, since 2×661616314635² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661616314637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22053877140 + ... + 22053877169.

It is an arithmetic number, because the mean of its divisors is an integer number (132323262930).

Almost surely, 2^661616314635 is an apocalyptic number.

661616314635 is a deficient number, since it is larger than the sum of its proper divisors (396969788805).

661616314635 is a wasteful number, since it uses less digits than its factorization.

661616314635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44107754317.

The product of its digits is 1399680, while the sum is 48.

The spelling of 661616314635 in words is "six hundred sixty-one billion, six hundred sixteen million, three hundred fourteen thousand, six hundred thirty-five".