646644600514166 has 16 divisors (see below), whose sum is σ = 971094122723088. Its totient is φ = 322946775244800.

The previous prime is 646644600514163. The next prime is 646644600514177. The reversal of 646644600514166 is 661415006446646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646644600514163) 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, 47910155 + ... + 59905526.

It is an arithmetic number, because the mean of its divisors is an integer number (60693382670193).

Almost surely, 2^{646644600514166} is an apocalyptic number.

646644600514166 is a deficient number, since it is larger than the sum of its proper divisors (324449522208922).

646644600514166 is a wasteful number, since it uses less digits than its factorization.

646644600514166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107819167.

The product of its (nonzero) digits is 59719680, while the sum is 59.

The spelling of 646644600514166 in words is "six hundred forty-six trillion, six hundred forty-four billion, six hundred million, five hundred fourteen thousand, one hundred sixty-six".