166157507 has 8 divisors (see below), whose sum is σ = 176558256. Its totient is φ = 155826432.

The previous prime is 166157471. The next prime is 166157533. The reversal of 166157507 is 705751661.

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

It is a cyclic number.

It is not a de Polignac number, because 166157507 - 2¹² = 166153411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166157557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12458 + ... + 22079.

It is an arithmetic number, because the mean of its divisors is an integer number (22069782).

Almost surely, 2^166157507 is an apocalyptic number.

166157507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

166157507 is a deficient number, since it is larger than the sum of its proper divisors (10400749).

166157507 is a wasteful number, since it uses less digits than its factorization.

166157507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34837.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 166157507 is about 12890.2097345233. The cubic root of 166157507 is about 549.7602337839.

The spelling of 166157507 in words is "one hundred sixty-six million, one hundred fifty-seven thousand, five hundred seven".