55748666 has 4 divisors (see below), whose sum is σ = 83623002. Its totient is φ = 27874332.

The previous prime is 55748657. The next prime is 55748681. The reversal of 55748666 is 66684755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66684755 = 5 ⋅13336951.

It can be written as a sum of positive squares in only one way, i.e., 50708641 + 5040025 = 7121^2 + 2245^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55748666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13937165 + ... + 13937168.

Almost surely, 2^55748666 is an apocalyptic number.

55748666 is a deficient number, since it is larger than the sum of its proper divisors (27874336).

55748666 is a wasteful number, since it uses less digits than its factorization.

55748666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27874335.

The product of its digits is 1209600, while the sum is 47.

The square root of 55748666 is about 7466.5029297523. The cubic root of 55748666 is about 382.0130154644.

The spelling of 55748666 in words is "fifty-five million, seven hundred forty-eight thousand, six hundred sixty-six".