66671157 has 8 divisors (see below), whose sum is σ = 101594176. Its totient is φ = 38097792.

The previous prime is 66671131. The next prime is 66671167. The reversal of 66671157 is 75117666.

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

It is not a de Polignac number, because 66671157 - 2¹⁹ = 66146869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66671117) 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, 1587388 + ... + 1587429.

It is an arithmetic number, because the mean of its divisors is an integer number (12699272).

Almost surely, 2^66671157 is an apocalyptic number.

It is an amenable number.

66671157 is a deficient number, since it is larger than the sum of its proper divisors (34923019).

66671157 is a wasteful number, since it uses less digits than its factorization.

66671157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174827.

The product of its digits is 52920, while the sum is 39.

The square root of 66671157 is about 8165.2407802832. The cubic root of 66671157 is about 405.4892365386.

The spelling of 66671157 in words is "sixty-six million, six hundred seventy-one thousand, one hundred fifty-seven".