66625845 has 64 divisors (see below), whose sum is σ = 127008000. Its totient is φ = 29399040.

The previous prime is 66625831. The next prime is 66625879. The reversal of 66625845 is 54852666.

It is not a de Polignac number, because 66625845 - 2⁵ = 66625813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66625797 and 66625806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 190731 + ... + 191079.

It is an arithmetic number, because the mean of its divisors is an integer number (1984500).

Almost surely, 2^66625845 is an apocalyptic number.

66625845 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66625845 is a deficient number, since it is larger than the sum of its proper divisors (60382155).

66625845 is a wasteful number, since it uses less digits than its factorization.

66625845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its digits is 345600, while the sum is 42.

The square root of 66625845 is about 8162.4656201420. The cubic root of 66625845 is about 405.3973542659.

The spelling of 66625845 in words is "sixty-six million, six hundred twenty-five thousand, eight hundred forty-five".