66634653542270 has 32 divisors (see below), whose sum is σ = 130871891030400. Its totient is φ = 24226030836640.

The previous prime is 66634653542221. The next prime is 66634653542311. The reversal of 66634653542270 is 7224535643666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58839932 + ... + 59961711.

It is an arithmetic number, because the mean of its divisors is an integer number (4089746594700).

Almost surely, 2^{66634653542270} is an apocalyptic number.

66634653542270 is a deficient number, since it is larger than the sum of its proper divisors (64237237488130).

66634653542270 is a wasteful number, since it uses less digits than its factorization.

66634653542270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118806760.

The product of its (nonzero) digits is 130636800, while the sum is 59.

The spelling of 66634653542270 in words is "sixty-six trillion, six hundred thirty-four billion, six hundred fifty-three million, five hundred forty-two thousand, two hundred seventy".