66749001 has 16 divisors (see below), whose sum is σ = 98737920. Its totient is φ = 39767120.

The previous prime is 66748993. The next prime is 66749009. The reversal of 66749001 is 10094766.

It is a happy number.

66749001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66748993) and next prime (66749009).

It is a cyclic number.

It is not a de Polignac number, because 66749001 - 2³ = 66748993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (66749009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15195 + ... + 19088.

It is an arithmetic number, because the mean of its divisors is an integer number (6171120).

Almost surely, 2^66749001 is an apocalyptic number.

It is an amenable number.

66749001 is a deficient number, since it is larger than the sum of its proper divisors (31988919).

66749001 is a wasteful number, since it uses less digits than its factorization.

66749001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34356.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 66749001 is about 8170.0061811482. The cubic root of 66749001 is about 405.6469890493.

The spelling of 66749001 in words is "sixty-six million, seven hundred forty-nine thousand, one".