66951404 has 24 divisors (see below), whose sum is σ = 128252208. Its totient is φ = 30392640.

The previous prime is 66951403. The next prime is 66951419. The reversal of 66951404 is 40415966.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (66951403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7382 + ... + 13725.

It is an arithmetic number, because the mean of its divisors is an integer number (5343842).

Almost surely, 2^66951404 is an apocalyptic number.

It is an amenable number.

66951404 is a deficient number, since it is larger than the sum of its proper divisors (61300804).

66951404 is a wasteful number, since it uses less digits than its factorization.

66951404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21185 (or 21183 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66951404 is about 8182.3837602498. The cubic root of 66951404 is about 406.0565897807.

The spelling of 66951404 in words is "sixty-six million, nine hundred fifty-one thousand, four hundred four".