66969698 has 16 divisors (see below), whose sum is σ = 110989440. Its totient is φ = 30144576.

The previous prime is 66969677. The next prime is 66969713. The reversal of 66969698 is 89696966.

It is a super-2 number, since 2×66969698² = 8969880900422408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42038 + ... + 43601.

It is an arithmetic number, because the mean of its divisors is an integer number (6936840).

Almost surely, 2^66969698 is an apocalyptic number.

66969698 is a deficient number, since it is larger than the sum of its proper divisors (44019742).

66969698 is a wasteful number, since it uses less digits than its factorization.

66969698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85681.

The product of its digits is 7558272, while the sum is 59.

The square root of 66969698 is about 8183.5015732876. The cubic root of 66969698 is about 406.0935704479.

The spelling of 66969698 in words is "sixty-six million, nine hundred sixty-nine thousand, six hundred ninety-eight".