66157003 has 8 divisors (see below), whose sum is σ = 72873216. Its totient is φ = 59557800.

The previous prime is 66156989. The next prime is 66157051. The reversal of 66157003 is 30075166.

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 66157003 - 2⁵ = 66156971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66158003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28063 + ... + 30328.

It is an arithmetic number, because the mean of its divisors is an integer number (9109152).

Almost surely, 2^66157003 is an apocalyptic number.

66157003 is a deficient number, since it is larger than the sum of its proper divisors (6716213).

66157003 is a wasteful number, since it uses less digits than its factorization.

66157003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58505.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 66157003 is about 8133.6955315527. The cubic root of 66157003 is about 404.4441961824. Note that the first 3 decimals are identical.

It can be divided in two parts, 6615700 and 3, that added together give a triangular number (6615703 = T₃₆₃₇).

The spelling of 66157003 in words is "sixty-six million, one hundred fifty-seven thousand, three".