1066636998 has 60 divisors (see below), whose sum is σ = 2780291052. Its totient is φ = 304751160.

The previous prime is 1066636993. The next prime is 1066637003. The reversal of 1066636998 is 8996366601.

It is an interprime number because it is at equal distance from previous prime (1066636993) and next prime (1066637003).

It is a super-2 number, since 2×1066636998² = 2275428971004904008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066636993) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 59248 + ... + 75123.

Almost surely, 2^1066636998 is an apocalyptic number.

1066636998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1066636998 is an abundant number, since it is smaller than the sum of its proper divisors (1713654054).

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

1066636998 is a wasteful number, since it uses less digits than its factorization.

1066636998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134399 (or 134383 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 1066636998 is about 32659.4090271089. The cubic root of 1066636998 is about 1021.7364366956.

The spelling of 1066636998 in words is "one billion, sixty-six million, six hundred thirty-six thousand, nine hundred ninety-eight".