661153351166 has 96 divisors (see below), whose sum is σ = 1360906624512. Its totient is φ = 237281130240.

The previous prime is 661153351163. The next prime is 661153351193.

661153351166 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×661153351166² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661153351163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477521 + ... + 1245123.

It is an arithmetic number, because the mean of its divisors is an integer number (14176110672).

Almost surely, 2^661153351166 is an apocalyptic number.

661153351166 is an abundant number, since it is smaller than the sum of its proper divisors (699753273346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661153351166 is a wasteful number, since it uses less digits than its factorization.

661153351166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767694 (or 767687 counting only the distinct ones).

The product of its digits is 291600, while the sum is 44.

The spelling of 661153351166 in words is "six hundred sixty-one billion, one hundred fifty-three million, three hundred fifty-one thousand, one hundred sixty-six".