70072660 has 24 divisors (see below), whose sum is σ = 168174720. Its totient is φ = 24024864.

The previous prime is 70072609. The next prime is 70072663. The reversal of 70072660 is 6627007.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70072663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250120 + ... + 250399.

It is an arithmetic number, because the mean of its divisors is an integer number (7007280).

Almost surely, 2^70072660 is an apocalyptic number.

70072660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70072660 is an abundant number, since it is smaller than the sum of its proper divisors (98102060).

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

70072660 is a wasteful number, since it uses less digits than its factorization.

70072660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500535 (or 500533 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 70072660 is about 8370.9414046450. The cubic root of 70072660 is about 412.2710771423.

Adding to 70072660 its reverse (6627007), we get a palindrome (76699667).

The spelling of 70072660 in words is "seventy million, seventy-two thousand, six hundred sixty".