66770654 has 16 divisors (see below), whose sum is σ = 102124800. Its totient is φ = 32732184.

The previous prime is 66770651. The next prime is 66770657. The reversal of 66770654 is 45607766.

It is an interprime number because it is at equal distance from previous prime (66770651) and next prime (66770657).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84449 + ... + 85235.

It is an arithmetic number, because the mean of its divisors is an integer number (6382800).

Almost surely, 2^66770654 is an apocalyptic number.

66770654 is a deficient number, since it is larger than the sum of its proper divisors (35354146).

66770654 is a wasteful number, since it uses less digits than its factorization.

66770654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 66770654 is about 8171.3312256939. The cubic root of 66770654 is about 405.6908475068.

The spelling of 66770654 in words is "sixty-six million, seven hundred seventy thousand, six hundred fifty-four".