66235901 has 8 divisors (see below), whose sum is σ = 67551744. Its totient is φ = 64933200.

The previous prime is 66235879. The next prime is 66235943. The reversal of 66235901 is 10953266.

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 66235901 - 2¹⁰ = 66234877 is a prime.

It is a super-5 number, since 5×66235901⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66231901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7220 + ... + 13586.

It is an arithmetic number, because the mean of its divisors is an integer number (8443968).

Almost surely, 2^66235901 is an apocalyptic number.

It is an amenable number.

66235901 is a deficient number, since it is larger than the sum of its proper divisors (1315843).

66235901 is a wasteful number, since it uses less digits than its factorization.

66235901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 66235901 is about 8138.5441572802. The cubic root of 66235901 is about 404.6049106448.

It can be divided in two parts, 662 and 35901, that added together give a palindrome (36563).

The spelling of 66235901 in words is "sixty-six million, two hundred thirty-five thousand, nine hundred one".