166516651520435 has 16 divisors (see below), whose sum is σ = 203298255341280. Its totient is φ = 130896505409280.

The previous prime is 166516651520419. The next prime is 166516651520447. The reversal of 166516651520435 is 534025156615661.

It is not a de Polignac number, because 166516651520435 - 2⁴ = 166516651520419 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126418922 + ... + 127729311.

It is an arithmetic number, because the mean of its divisors is an integer number (12706140958830).

Almost surely, 2^{166516651520435} is an apocalyptic number.

166516651520435 is a deficient number, since it is larger than the sum of its proper divisors (36781603820845).

166516651520435 is a wasteful number, since it uses less digits than its factorization.

166516651520435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254150518.

The product of its (nonzero) digits is 19440000, while the sum is 56.

The spelling of 166516651520435 in words is "one hundred sixty-six trillion, five hundred sixteen billion, six hundred fifty-one million, five hundred twenty thousand, four hundred thirty-five".