166631461225650 has 120 divisors (see below), whose sum is σ = 462999081006000. Its totient is φ = 44434050495840.

The previous prime is 166631461225643. The next prime is 166631461225657. The reversal of 166631461225650 is 56522164136661.

It is an interprime number because it is at equal distance from previous prime (166631461225643) and next prime (166631461225657).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (166631461225657) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 187878537 + ... + 188763363.

It is an arithmetic number, because the mean of its divisors is an integer number (3858325675050).

Almost surely, 2^{166631461225650} is an apocalyptic number.

166631461225650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166631461225650 is an abundant number, since it is smaller than the sum of its proper divisors (296367619780350).

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

166631461225650 is a wasteful number, since it uses less digits than its factorization.

166631461225650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931350 (or 931336 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 166631461225650 in words is "one hundred sixty-six trillion, six hundred thirty-one billion, four hundred sixty-one million, two hundred twenty-five thousand, six hundred fifty".