166087843636990 has 32 divisors (see below), whose sum is σ = 333075195915264. Its totient is φ = 59110567172640.

The previous prime is 166087843636937. The next prime is 166087843636993. The reversal of 166087843636990 is 99636348780661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166087843636993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16062648954 + ... + 16062659293.

It is an arithmetic number, because the mean of its divisors is an integer number (10408599872352).

Almost surely, 2^{166087843636990} is an apocalyptic number.

166087843636990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166087843636990 is an abundant number, since it is smaller than the sum of its proper divisors (166987352278274).

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

166087843636990 is a wasteful number, since it uses less digits than its factorization.

166087843636990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32125308312.

The product of its (nonzero) digits is 1693052928, while the sum is 76.

The spelling of 166087843636990 in words is "one hundred sixty-six trillion, eighty-seven billion, eight hundred forty-three million, six hundred thirty-six thousand, nine hundred ninety".