66914407 has 16 divisors (see below), whose sum is σ = 78895872. Its totient is φ = 55560960.

The previous prime is 66914401. The next prime is 66914411. The reversal of 66914407 is 70441966.

It is a de Polignac number, because none of the positive numbers 2^k-66914407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66914401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38583 + ... + 40279.

It is an arithmetic number, because the mean of its divisors is an integer number (4930992).

Almost surely, 2^66914407 is an apocalyptic number.

66914407 is a deficient number, since it is larger than the sum of its proper divisors (11981465).

66914407 is a wasteful number, since it uses less digits than its factorization.

66914407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66914407 is about 8180.1226763417. The cubic root of 66914407 is about 405.9817810748.

The spelling of 66914407 in words is "sixty-six million, nine hundred fourteen thousand, four hundred seven".