66098455 has 4 divisors (see below), whose sum is σ = 79318152. Its totient is φ = 52878760.

The previous prime is 66098449. The next prime is 66098503. The reversal of 66098455 is 55489066.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66098455 - 2⁷ = 66098327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6609841 + ... + 6609850.

It is an arithmetic number, because the mean of its divisors is an integer number (19829538).

Almost surely, 2^66098455 is an apocalyptic number.

66098455 is a deficient number, since it is larger than the sum of its proper divisors (13219697).

66098455 is a wasteful number, since it uses less digits than its factorization.

66098455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13219696.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 66098455 is about 8130.0956328939. The cubic root of 66098455 is about 404.3248518628.

The spelling of 66098455 in words is "sixty-six million, ninety-eight thousand, four hundred fifty-five".