189903757966 has 32 divisors (see below), whose sum is σ = 311518196640. Its totient is φ = 86294813184.

The previous prime is 189903757961. The next prime is 189903757993. The reversal of 189903757966 is 669757309981.

It is a junction number, because it is equal to n+sod(n) for n = 189903757895 and 189903757904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189903757961) 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, 992041 + ... + 1167883.

It is an arithmetic number, because the mean of its divisors is an integer number (9734943645).

Almost surely, 2^189903757966 is an apocalyptic number.

189903757966 is a deficient number, since it is larger than the sum of its proper divisors (121614438674).

189903757966 is a wasteful number, since it uses less digits than its factorization.

189903757966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176500.

The product of its (nonzero) digits is 154314720, while the sum is 70.

The spelling of 189903757966 in words is "one hundred eighty-nine billion, nine hundred three million, seven hundred fifty-seven thousand, nine hundred sixty-six".