66703949 has 8 divisors (see below), whose sum is σ = 72092832. Its totient is φ = 61351920.

The previous prime is 66703919. The next prime is 66703957. The reversal of 66703949 is 94930766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66703949 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 (66703919) 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, 5387 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (9011604).

Almost surely, 2^66703949 is an apocalyptic number.

It is an amenable number.

66703949 is a deficient number, since it is larger than the sum of its proper divisors (5388883).

66703949 is a wasteful number, since it uses less digits than its factorization.

66703949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18427.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 66703949 is about 8167.2485575009. The cubic root of 66703949 is about 405.5557051798. Note that the first 3 decimals are identical.

The spelling of 66703949 in words is "sixty-six million, seven hundred three thousand, nine hundred forty-nine".