66802419 has 24 divisors (see below), whose sum is σ = 102604320. Its totient is φ = 41788032.

The previous prime is 66802403. The next prime is 66802429. The reversal of 66802419 is 91420866.

It is not a de Polignac number, because 66802419 - 2⁴ = 66802403 is a prime.

It is a super-2 number, since 2×66802419² = 8925126368503122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66802429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7927 + ... + 14015.

It is an arithmetic number, because the mean of its divisors is an integer number (4275180).

Almost surely, 2^66802419 is an apocalyptic number.

66802419 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

66802419 is a deficient number, since it is larger than the sum of its proper divisors (35801901).

66802419 is a wasteful number, since it uses less digits than its factorization.

66802419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171 (or 6168 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 66802419 is about 8173.2746803224. The cubic root of 66802419 is about 405.7551708084.

The spelling of 66802419 in words is "sixty-six million, eight hundred two thousand, four hundred nineteen".