1663520070 has 32 divisors (see below), whose sum is σ = 4008372480. Its totient is φ = 441836000.

The previous prime is 1663519981. The next prime is 1663520077. The reversal of 1663520070 is 700253661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663520077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102930 + ... + 117989.

It is an arithmetic number, because the mean of its divisors is an integer number (125261640).

Almost surely, 2^1663520070 is an apocalyptic number.

1663520070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663520070 is an abundant number, since it is smaller than the sum of its proper divisors (2344852410).

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

1663520070 is a wasteful number, since it uses less digits than its factorization.

1663520070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221180.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 1663520070 is about 40786.2730584691. The cubic root of 1663520070 is about 1184.8844908685.

The spelling of 1663520070 in words is "one billion, six hundred sixty-three million, five hundred twenty thousand, seventy".