64698669 has 30 divisors (see below), whose sum is σ = 112434894. Its totient is φ = 36968400.

The previous prime is 64698653. The next prime is 64698677. The reversal of 64698669 is 96689646.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62015625 + 2683044 = 7875^2 + 1638^2 .

It is not a de Polignac number, because 64698669 - 2⁴ = 64698653 is a prime.

It is a super-2 number, since 2×64698669² = 8371835540743122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64698169) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4182 + ... + 12119.

Almost surely, 2^64698669 is an apocalyptic number.

It is an amenable number.

64698669 is a deficient number, since it is larger than the sum of its proper divisors (47736225).

64698669 is a wasteful number, since it uses less digits than its factorization.

64698669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16327 (or 16311 counting only the distinct ones).

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

The square root of 64698669 is about 8043.5482841840. The cubic root of 64698669 is about 401.4502956677.

The spelling of 64698669 in words is "sixty-four million, six hundred ninety-eight thousand, six hundred sixty-nine".