66156001 has 8 divisors (see below), whose sum is σ = 68783904. Its totient is φ = 63576480.

The previous prime is 66155941. The next prime is 66156017. The reversal of 66156001 is 10065166.

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 66156001 - 2²¹ = 64058849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66156071) 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, 9295 + ... + 14788.

It is an arithmetic number, because the mean of its divisors is an integer number (8597988).

Almost surely, 2^66156001 is an apocalyptic number.

It is an amenable number.

66156001 is a deficient number, since it is larger than the sum of its proper divisors (2627903).

66156001 is a wasteful number, since it uses less digits than its factorization.

66156001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24191.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 66156001 is about 8133.6339357018. The cubic root of 66156001 is about 404.4421542967.

The spelling of 66156001 in words is "sixty-six million, one hundred fifty-six thousand, one".