166354421514402 has 32 divisors (see below), whose sum is σ = 362956719493440. Its totient is φ = 50410206038720.

The previous prime is 166354421514389. The next prime is 166354421514509. The reversal of 166354421514402 is 204415124453661.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9609688 + ... + 20616860.

It is an arithmetic number, because the mean of its divisors is an integer number (11342397484170).

Almost surely, 2^{166354421514402} is an apocalyptic number.

166354421514402 is an abundant number, since it is smaller than the sum of its proper divisors (196602297979038).

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

166354421514402 is a wasteful number, since it uses less digits than its factorization.

166354421514402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11236178.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 166354421514402 in words is "one hundred sixty-six trillion, three hundred fifty-four billion, four hundred twenty-one million, five hundred fourteen thousand, four hundred two".