66149017 has 4 divisors (see below), whose sum is σ = 72162576. Its totient is φ = 60135460.

The previous prime is 66148987. The next prime is 66149059. The reversal of 66149017 is 71094166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66149017 - 2¹⁹ = 65624729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66149077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3006763 + ... + 3006784.

It is an arithmetic number, because the mean of its divisors is an integer number (18040644).

Almost surely, 2^66149017 is an apocalyptic number.

It is an amenable number.

66149017 is a deficient number, since it is larger than the sum of its proper divisors (6013559).

66149017 is a wasteful number, since it uses less digits than its factorization.

66149017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013558.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 66149017 is about 8133.2045959757. The cubic root of 66149017 is about 404.4279216578.

The spelling of 66149017 in words is "sixty-six million, one hundred forty-nine thousand, seventeen".