66703670 has 24 divisors (see below), whose sum is σ = 131976432. Its totient is φ = 24255440.

The previous prime is 66703667. The next prime is 66703691. The reversal of 66703670 is 7630766.

It is a self number, because there is not a number n which added to its sum of digits gives 66703670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26354 + ... + 28773.

It is an arithmetic number, because the mean of its divisors is an integer number (5499018).

Almost surely, 2^66703670 is an apocalyptic number.

66703670 is a deficient number, since it is larger than the sum of its proper divisors (65272762).

66703670 is a wasteful number, since it uses less digits than its factorization.

66703670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55156 (or 55145 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 66703670 is about 8167.2314770674. The cubic root of 66703670 is about 405.5551397451. Note that the first 3 decimals are identical.

The spelling of 66703670 in words is "sixty-six million, seven hundred three thousand, six hundred seventy".