55166220670 has 32 divisors (see below), whose sum is σ = 108711961056. Its totient is φ = 19989043200.

The previous prime is 55166220649. The next prime is 55166220679. The reversal of 55166220670 is 7602266155.

It is a super-2 number, since 2×55166220670² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166220679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861459 + ... + 923278.

It is an arithmetic number, because the mean of its divisors is an integer number (3397248783).

Almost surely, 2^55166220670 is an apocalyptic number.

55166220670 is a deficient number, since it is larger than the sum of its proper divisors (53545740386).

55166220670 is a wasteful number, since it uses less digits than its factorization.

55166220670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785036.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 55166220670 in words is "fifty-five billion, one hundred sixty-six million, two hundred twenty thousand, six hundred seventy".