166685003537 has 16 divisors (see below), whose sum is σ = 189169384320. Its totient is φ = 145599379200.

The previous prime is 166685003483. The next prime is 166685003593. The reversal of 166685003537 is 735300586661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166685003537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166685003437) 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, 165389 + ... + 600602.

It is an arithmetic number, because the mean of its divisors is an integer number (11823086520).

Almost surely, 2^166685003537 is an apocalyptic number.

It is an amenable number.

166685003537 is a deficient number, since it is larger than the sum of its proper divisors (22484380783).

166685003537 is a wasteful number, since it uses less digits than its factorization.

166685003537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766904.

The product of its (nonzero) digits is 2721600, while the sum is 50.

It can be divided in two parts, 16668 and 5003537, that added together give a palindrome (5020205).

The spelling of 166685003537 in words is "one hundred sixty-six billion, six hundred eighty-five million, three thousand, five hundred thirty-seven".