66677898 has 16 divisors (see below), whose sum is σ = 152406720. Its totient is φ = 19050816.

The previous prime is 66677887. The next prime is 66677983. The reversal of 66677898 is 89877666.

It is a Curzon number.

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, 793743 + ... + 793826.

It is an arithmetic number, because the mean of its divisors is an integer number (9525420).

Almost surely, 2^66677898 is an apocalyptic number.

66677898 is an abundant number, since it is smaller than the sum of its proper divisors (85728822).

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

66677898 is a wasteful number, since it uses less digits than its factorization.

66677898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587581.

The product of its digits is 6096384, while the sum is 57.

The square root of 66677898 is about 8165.6535562072. The cubic root of 66677898 is about 405.5029021723.

The spelling of 66677898 in words is "sixty-six million, six hundred seventy-seven thousand, eight hundred ninety-eight".