166738550390 has 16 divisors (see below), whose sum is σ = 300163860432. Its totient is φ = 66687760224.

The previous prime is 166738550389. The next prime is 166738550453. The reversal of 166738550390 is 93055837661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865649 + ... + 1040588.

It is an arithmetic number, because the mean of its divisors is an integer number (18760241277).

Almost surely, 2^166738550390 is an apocalyptic number.

166738550390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166738550390 is a deficient number, since it is larger than the sum of its proper divisors (133425310042).

166738550390 is a wasteful number, since it uses less digits than its factorization.

166738550390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914991.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 166738550390 in words is "one hundred sixty-six billion, seven hundred thirty-eight million, five hundred fifty thousand, three hundred ninety".