66632901 has 8 divisors (see below), whose sum is σ = 88920000. Its totient is φ = 44383872.

The previous prime is 66632897. The next prime is 66632921. The reversal of 66632901 is 10923666.

It is a happy number.

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

It is not a de Polignac number, because 66632901 - 2² = 66632897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66632921) 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, 5145 + ... + 12638.

It is an arithmetic number, because the mean of its divisors is an integer number (11115000).

Almost surely, 2^66632901 is an apocalyptic number.

It is an amenable number.

66632901 is a deficient number, since it is larger than the sum of its proper divisors (22287099).

66632901 is a wasteful number, since it uses less digits than its factorization.

66632901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19035.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 66632901 is about 8162.8978310402. The cubic root of 66632901 is about 405.4116649425.

The spelling of 66632901 in words is "sixty-six million, six hundred thirty-two thousand, nine hundred one".