64669698 has 32 divisors (see below), whose sum is σ = 149961600. Its totient is φ = 20618928.

The previous prime is 64669679. The next prime is 64669733. The reversal of 64669698 is 89696646.

It is a happy number.

64669698 is a `hidden beast` number, since 6 + 466 + 96 + 98 = 666.

It is a super-2 number, since 2×64669698² = 8364339678822408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24793 + ... + 27276.

It is an arithmetic number, because the mean of its divisors is an integer number (4686300).

Almost surely, 2^64669698 is an apocalyptic number.

64669698 is an abundant number, since it is smaller than the sum of its proper divisors (85291902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64669698 is a wasteful number, since it uses less digits than its factorization.

64669698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52103 (or 52097 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 64669698 is about 8041.7471982151. The cubic root of 64669698 is about 401.3903657747.

The spelling of 64669698 in words is "sixty-four million, six hundred sixty-nine thousand, six hundred ninety-eight".