66806154 has 16 divisors (see below), whose sum is σ = 148458240. Its totient is φ = 22268700.

The previous prime is 66806153. The next prime is 66806161. The reversal of 66806154 is 45160866.

It is not an unprimeable number, because it can be changed into a prime (66806153) 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, 618522 + ... + 618629.

It is an arithmetic number, because the mean of its divisors is an integer number (9278640).

Almost surely, 2^66806154 is an apocalyptic number.

66806154 is an abundant number, since it is smaller than the sum of its proper divisors (81652086).

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

66806154 is a wasteful number, since it uses less digits than its factorization.

66806154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237162 (or 1237156 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66806154 is about 8173.5031657179. The cubic root of 66806154 is about 405.7627327468.

The spelling of 66806154 in words is "sixty-six million, eight hundred six thousand, one hundred fifty-four".