70621663 has 4 divisors (see below), whose sum is σ = 80710480. Its totient is φ = 60532848.

The previous prime is 70621657. The next prime is 70621667. The reversal of 70621663 is 36612607.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70621663 - 2¹⁷ = 70490591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70621667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5044398 + ... + 5044411.

It is an arithmetic number, because the mean of its divisors is an integer number (20177620).

Almost surely, 2^70621663 is an apocalyptic number.

70621663 is a deficient number, since it is larger than the sum of its proper divisors (10088817).

70621663 is a wasteful number, since it uses less digits than its factorization.

70621663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10088816.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 70621663 is about 8403.6696151146. The cubic root of 70621663 is about 413.3449601453.

The spelling of 70621663 in words is "seventy million, six hundred twenty-one thousand, six hundred sixty-three".