1551060666 has 12 divisors (see below), whose sum is σ = 3360631482. Its totient is φ = 517020216.

The previous prime is 1551060661. The next prime is 1551060691. The reversal of 1551060666 is 6660601551.

It can be written as a sum of positive squares in only one way, i.e., 1254222225 + 296838441 = 35415^2 + 17229^2 .

It is a super-2 number, since 2×1551060666² = 4811578379224727112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1551060666.

It is not an unprimeable number, because it can be changed into a prime (1551060661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43085001 + ... + 43085036.

Almost surely, 2^1551060666 is an apocalyptic number.

1551060666 is an abundant number, since it is smaller than the sum of its proper divisors (1809570816).

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

1551060666 is a wasteful number, since it uses less digits than its factorization.

1551060666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86170045 (or 86170042 counting only the distinct ones).

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

The square root of 1551060666 is about 39383.5075380546. The cubic root of 1551060666 is about 1157.5584462027.

It can be divided in two parts, 15510 and 60666, that added together give a square (76176 = 276²).

The spelling of 1551060666 in words is "one billion, five hundred fifty-one million, sixty thousand, six hundred sixty-six".