66626998 has 16 divisors (see below), whose sum is σ = 107652096. Its totient is φ = 30836520.

The previous prime is 66626969. The next prime is 66627023. The reversal of 66626998 is 89962666.

It is a congruent 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, 21936 + ... + 24787.

It is an arithmetic number, because the mean of its divisors is an integer number (6728256).

Almost surely, 2^66626998 is an apocalyptic number.

66626998 is a deficient number, since it is larger than the sum of its proper divisors (41025098).

66626998 is a wasteful number, since it uses less digits than its factorization.

66626998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46779.

The product of its digits is 1679616, while the sum is 52.

The square root of 66626998 is about 8162.5362480053. The cubic root of 66626998 is about 405.3996928001.

The spelling of 66626998 in words is "sixty-six million, six hundred twenty-six thousand, nine hundred ninety-eight".