66149601 has 32 divisors (see below), whose sum is σ = 107642880. Its totient is φ = 35271936.

The previous prime is 66149591. The next prime is 66149641. The reversal of 66149601 is 10694166.

It is not a de Polignac number, because 66149601 - 2⁶ = 66149537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66149641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44610 + ... + 46068.

It is an arithmetic number, because the mean of its divisors is an integer number (3363840).

Almost surely, 2^66149601 is an apocalyptic number.

It is an amenable number.

66149601 is a deficient number, since it is larger than the sum of its proper divisors (41493279).

66149601 is a wasteful number, since it uses less digits than its factorization.

66149601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 66149601 is about 8133.2404981041. The cubic root of 66149601 is about 404.4291118252.

The spelling of 66149601 in words is "sixty-six million, one hundred forty-nine thousand, six hundred one".