166240537 has 8 divisors (see below), whose sum is σ = 170302176. Its totient is φ = 162187872.

The previous prime is 166240517. The next prime is 166240541. The reversal of 166240537 is 735042661.

It is a happy number.

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 166240537 - 2⁷ = 166240409 is a prime.

It is a super-2 number, since 2×166240537² = 55271832284096738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166240517) 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, 49413 + ... + 52669.

It is an arithmetic number, because the mean of its divisors is an integer number (21287772).

Almost surely, 2^166240537 is an apocalyptic number.

It is an amenable number.

166240537 is a deficient number, since it is larger than the sum of its proper divisors (4061639).

166240537 is a wasteful number, since it uses less digits than its factorization.

166240537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 166240537 is about 12893.4299936053. The cubic root of 166240537 is about 549.8517914708.

The spelling of 166240537 in words is "one hundred sixty-six million, two hundred forty thousand, five hundred thirty-seven".