1551006166 has 4 divisors (see below), whose sum is σ = 2326509252. Its totient is φ = 775503082.

The previous prime is 1551006161. The next prime is 1551006187. The reversal of 1551006166 is 6616001551.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551006161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387751540 + ... + 387751543.

It is an arithmetic number, because the mean of its divisors is an integer number (581627313).

Almost surely, 2^1551006166 is an apocalyptic number.

1551006166 is a deficient number, since it is larger than the sum of its proper divisors (775503086).

1551006166 is an equidigital number, since it uses as much as digits as its factorization.

1551006166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775503085.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1551006166 is about 39382.8156179824. The cubic root of 1551006166 is about 1157.5448882386.

The spelling of 1551006166 in words is "one billion, five hundred fifty-one million, six thousand, one hundred sixty-six".