66912486 has 16 divisors (see below), whose sum is σ = 136019568. Its totient is φ = 21938400.

The previous prime is 66912481. The next prime is 66912491. The reversal of 66912486 is 68421966.

It is an interprime number because it is at equal distance from previous prime (66912481) and next prime (66912491).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66912481) 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, 91045 + ... + 91776.

It is an arithmetic number, because the mean of its divisors is an integer number (8501223).

Almost surely, 2^66912486 is an apocalyptic number.

66912486 is an abundant number, since it is smaller than the sum of its proper divisors (69107082).

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

66912486 is a wasteful number, since it uses less digits than its factorization.

66912486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182887.

The product of its digits is 124416, while the sum is 42.

The square root of 66912486 is about 8180.0052567220. The cubic root of 66912486 is about 405.9778960197.

The spelling of 66912486 in words is "sixty-six million, nine hundred twelve thousand, four hundred eighty-six".