70420787661 has 8 divisors (see below), whose sum is σ = 107307866944. Its totient is φ = 40240450080.

The previous prime is 70420787659. The next prime is 70420787669. The reversal of 70420787661 is 16678702407.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70420787661 - 2¹ = 70420787659 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70420787661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70420787669) 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, 1676685400 + ... + 1676685441.

It is an arithmetic number, because the mean of its divisors is an integer number (13413483368).

Almost surely, 2^70420787661 is an apocalyptic number.

It is an amenable number.

70420787661 is a deficient number, since it is larger than the sum of its proper divisors (36887079283).

70420787661 is a wasteful number, since it uses less digits than its factorization.

70420787661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353370851.

The product of its (nonzero) digits is 790272, while the sum is 48.

The spelling of 70420787661 in words is "seventy billion, four hundred twenty million, seven hundred eighty-seven thousand, six hundred sixty-one".