66750026 has 16 divisors (see below), whose sum is σ = 114571584. Its totient is φ = 28571424.

The previous prime is 66750017. The next prime is 66750029. The reversal of 66750026 is 62005766.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66749974 and 66750001.

It is not an unprimeable number, because it can be changed into a prime (66750029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10841 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (7160724).

Almost surely, 2^66750026 is an apocalyptic number.

66750026 is the 6671-st pentagonal number.

66750026 is a deficient number, since it is larger than the sum of its proper divisors (47821558).

66750026 is a wasteful number, since it uses less digits than its factorization.

66750026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66750026 is about 8170.0689103581. The cubic root of 66750026 is about 405.6490654152.

The spelling of 66750026 in words is "sixty-six million, seven hundred fifty thousand, twenty-six".