66420698 has 8 divisors (see below), whose sum is σ = 102323892. Its totient is φ = 32312736.

The previous prime is 66420689. The next prime is 66420703. The reversal of 66420698 is 89602466.

It can be written as a sum of positive squares in 2 ways, for example, as 66373609 + 47089 = 8147^2 + 217^2 .

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

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, 448715 + ... + 448862.

Almost surely, 2^66420698 is an apocalyptic number.

66420698 is a deficient number, since it is larger than the sum of its proper divisors (35903194).

66420698 is a wasteful number, since it uses less digits than its factorization.

66420698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897616.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 66420698 is about 8149.8894471029. The cubic root of 66420698 is about 404.9808414450.

The spelling of 66420698 in words is "sixty-six million, four hundred twenty thousand, six hundred ninety-eight".