66019497 has 8 divisors (see below), whose sum is σ = 88129440. Its totient is φ = 43961280.

The previous prime is 66019493. The next prime is 66019501. The reversal of 66019497 is 79491066.

It is an interprime number because it is at equal distance from previous prime (66019493) and next prime (66019501).

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

It is not a de Polignac number, because 66019497 - 2² = 66019493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66019493) 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, 9847 + ... + 15132.

It is an arithmetic number, because the mean of its divisors is an integer number (11016180).

Almost surely, 2^66019497 is an apocalyptic number.

It is an amenable number.

66019497 is a deficient number, since it is larger than the sum of its proper divisors (22109943).

66019497 is a wasteful number, since it uses less digits than its factorization.

66019497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 66019497 is about 8125.2382734293. The cubic root of 66019497 is about 404.1637921124.

The spelling of 66019497 in words is "sixty-six million, nineteen thousand, four hundred ninety-seven".