70660393440 has 384 divisors, whose sum is σ = 277426114560. Its totient is φ = 14719131648.

The previous prime is 70660393429. The next prime is 70660393451. The reversal of 70660393440 is 4439306607.

It is an interprime number because it is at equal distance from previous prime (70660393429) and next prime (70660393451).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 70660393392 and 70660393401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3440482 + ... + 3460958.

It is an arithmetic number, because the mean of its divisors is an integer number (722463840).

Almost surely, 2^70660393440 is an apocalyptic number.

70660393440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70660393440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138713057280).

70660393440 is an abundant number, since it is smaller than the sum of its proper divisors (206765721120).

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

70660393440 is a wasteful number, since it uses less digits than its factorization.

70660393440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20594 (or 20586 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The spelling of 70660393440 in words is "seventy billion, six hundred sixty million, three hundred ninety-three thousand, four hundred forty".