166145695490 has 8 divisors (see below), whose sum is σ = 299062251900. Its totient is φ = 66458278192.

The previous prime is 166145695489. The next prime is 166145695571. The reversal of 166145695490 is 94596541661.

It can be written as a sum of positive squares in 2 ways, for example, as 139788497689 + 26357197801 = 373883^2 + 162349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8307284765 + ... + 8307284784.

Almost surely, 2^166145695490 is an apocalyptic number.

166145695490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166145695490 is a deficient number, since it is larger than the sum of its proper divisors (132916556410).

166145695490 is a wasteful number, since it uses less digits than its factorization.

166145695490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16614569556.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 166145695490 in words is "one hundred sixty-six billion, one hundred forty-five million, six hundred ninety-five thousand, four hundred ninety".