66094987 has 8 divisors (see below), whose sum is σ = 77578976. Its totient is φ = 55121472.

The previous prime is 66094979. The next prime is 66095011. The reversal of 66094987 is 78949066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66094987 - 2³ = 66094979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66094987.

It is not an unprimeable number, because it can be changed into a prime (66094907) 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, 127338 + ... + 127855.

It is an arithmetic number, because the mean of its divisors is an integer number (9697372).

Almost surely, 2^66094987 is an apocalyptic number.

66094987 is a deficient number, since it is larger than the sum of its proper divisors (11483989).

66094987 is a wasteful number, since it uses less digits than its factorization.

66094987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255237.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 66094987 is about 8129.8823484722. The cubic root of 66094987 is about 404.3177804765.

It can be divided in two parts, 66094 and 987, that added together give a square (67081 = 259²).

The spelling of 66094987 in words is "sixty-six million, ninety-four thousand, nine hundred eighty-seven".