551661066 has 48 divisors (see below), whose sum is σ = 1305551520. Its totient is φ = 166961760.

The previous prime is 551661059. The next prime is 551661107. The reversal of 551661066 is 660166155.

It is a self number, because there is not a number n which added to its sum of digits gives 551661066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248176 + ... + 250388.

It is an arithmetic number, because the mean of its divisors is an integer number (27198990).

Almost surely, 2^551661066 is an apocalyptic number.

551661066 is an abundant number, since it is smaller than the sum of its proper divisors (753890454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551661066 is a wasteful number, since it uses less digits than its factorization.

551661066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 551661066 is about 23487.4661468622. The cubic root of 551661066 is about 820.1452578283.

The spelling of 551661066 in words is "five hundred fifty-one million, six hundred sixty-one thousand, sixty-six".