661111225674 has 16 divisors (see below), whose sum is σ = 1322952579360. Its totient is φ = 220248720560.

The previous prime is 661111225603. The next prime is 661111225679. The reversal of 661111225674 is 476522111166.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (661111225679) 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, 30410229 + ... + 30431960.

It is an arithmetic number, because the mean of its divisors is an integer number (82684536210).

Almost surely, 2^661111225674 is an apocalyptic number.

661111225674 is an abundant number, since it is smaller than the sum of its proper divisors (661841353686).

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

661111225674 is a wasteful number, since it uses less digits than its factorization.

661111225674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60844005.

The product of its digits is 120960, while the sum is 42.

The spelling of 661111225674 in words is "six hundred sixty-one billion, one hundred eleven million, two hundred twenty-five thousand, six hundred seventy-four".